I have to disagree. If you had said CAM I would agree, as most of the CAM stuff in the free Fusion 360 is disabled. But if you want to learn parametric modeling, or design and print parts on an FDM 3D printer, the free Fusion 360 has pretty much all the features you need.
Fusion 360 has been crippled for hobby use now in a number of ways. The most annoying for me is a limit on how many active models you can have at any given time. Many of the high end features aimed at things like controlling mills and stress analysis are disabled. But all the basic modelling features are there. I designed a lamp and printed it on my 3D printer, and it worked great.
The limited version does not inhibit learning CAD in any way I can think of, save that you can only have a certain number of active files, so if you have a complex design with many parts it’s a hassle. But maybe I’m forgetting/missing something.
IDKittyKat: As others have said, to get into actual technical/engineering drafting, you need to have a lot of domain knowledge, and ideally a degree or at least a 2-year diploma/associate degree in the engineering field you want to work in. But there are lots of other places where such work can be had - for example, there is a large market for 3D models for games, VR, advertising, corporate publications, etc. Lots of those jobs allow remote work, too.
If you are interested in that kind of work, the good news is that Blender is free for educational or hobby use, and it’s one of the standards for 3D modeling. Jobs like this generally don’t require a degree, but they do generally require a portfolio of your work, and you’ll need to either have or develop an artistic eye.
You don’t need artistic mechanical skill - the software will do that for you. But you still need to be creative and have a good artistic eye. Whereas in engineering CAD you are often given very strict requirements and there may be no room for expression at all - which is good if you have no artistic talent.
There is also a market for the models themselves. You can create 3D models and sell them through online marketplaces just like freelance photogrpaphers sometimes submit photos to stock photo sites and get a portion of the money from the sales. I suspect this won’t earn you more than beer money, though.