those prices seem reasonable.
and practicing on any oil-painting paper would be fine.
impressionism isn’t TOO lofty of a style to shoot for…you’ll need some pretty basic fundamentals in place first. not that going straight for impressionistic style will be a disaster or anything,but think about wanting to learn guitar, because you want to play heavy metal. you can’t just stat out playing metal…you still need to learn chords, scales, and other basic elements.
painting is the same.
i would suggest going to your local libraries and finding books on beginner painting techniques (or maybe even some videos). you might even try google or youtube.
this is all a bit out of my element, as i am not a teacher, so i don’t have good advice as to how to direct your approach.
impressionism isn’t a regular painting blend technique, it incorporates a technique called stippling.
here is a “monet for beginners” video. search around for stuff on youtube. maybe it can help.
you might consider getting a set of oil pastels (sometimes call craypas) which are basically professional “real artist” crayons. they are much softer than normal crayons and leave more of the medium on your substrate (it’s like a waxy chalk). we started out in hs art doing impressionism with oil pastels an it was a good way to get our stroke technique figured out before committing to paint.
this next bit is a bit of editorializing and some personal opinion, so you can disregard it if you’d like.
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i really disagree with people telling you to buy tons of colors.
as a beginner, it will take some time and practice to mix colors. technically, the more you buy, the less mixing you will have to do. but color theory is such a fundamental aspect of art, and i think nearly all student-grade/amateur art looks amateur because people are using color straight out of tubes. life isn’t solid colors…when people use color straight of tubes, it looks cartoonish.
theoretically, anyone can do anything with a red/blue/yellow/black/white set. it takes some effort, but honestly starting EXTREMELY basic and working your way up would be the way to go. again, comparing it to guitar: you don’t start out learning massive barre chords and major 7th with massive fret spans and long pinky-reaches.
you start with tiny little easy chords, like D chords and get better at those until you are ready to add a little more in as you get more comfortable. fancy chords are fancy colors. sure, they add a lot–but you can play the same songs with basic chords (they just don’t have as many frills and are not as “fancy.”
starting you, you can be overwhelmed by color choices. there’s literally every color in the world available. and many opinions as to what a “basic” pallet would be.
you don’t need a warm and cool version of each color…you instead need to learn how to add warms and cools to basic colors to understand what “warm” and “cool” even means.
that said, i think you can get by on some pretty basic starter sets and just about any starter brush set. once you have supplies and start painting, you’ll be painting. you can agonize over making some perfect decision, but no one here will have the “right” answer–only personal advice. only you will know the right answers–and you won’t know them until you start doing it and messing around and seeing what you like, what works for you, what doesn’t, what you don’t like, and go from there.
i can tell you my favorite brushes and fiber-tips, but you might hate them. you might not be able to do anything with them. i can’t do much with a sable brush unless i’m doing watercolor. you could give me an extremely expensive set of oils in every color and i will still mix from basic colors, never using many of those tubes.
i will say the more options you have, the closer you are starting out to where you want the color to be. some browns are really hard to mix (i only use burnt sienna and burnt umber and mix all my browns from these, but that is me…my point is i buy those rather than mix my own browns from opposite colors…tube browns always look better).
i can also assure you that you can paint with nearly any quality of paint or brushes, you’ll just quickly realize the pitfalls of these things. in a pinch, i have finished murals with craft paints, the cheapest of the cheap, and you can make it work. beyond any doubt better materials make things so much easier (think of it like using your hand to drive a nail vs using a rock to pound it in, using rock vs using a hammer, using a hammer vs using a screw gun, using a screw gun vs using a nail gun, etc. each is a much better, easier solution than the preceding, but you can still build a whole house with just a hammer).
i say that because i feel like it is every easy to get intimidated by supplies. both paints and brushes have hundreds of varieties, levels of quality, and price points. i feel like it is easy to get a little intimidated. but don’t stress too much–just get some nice stuff you can afford and get started–you can always upgrade to better stuff when you feel like you have a better handle on everything.