You will likely find that your English improves markedly.
Latin is a young language, at least as it is taught. That is, the language has more of a designed feel and less of an evolved one. There are lots of regular patterns. I think this makes its study pleasant.
Though I must point out that when I took Latin, the teacher made up a final grade of D-- for me on condition that I not take it again. But this was because I was such a loser in 9th grade, and no fault of the language. I would enjoy taking it now, I think.
I found Latin to be somewhat challenging, at least the first semester. But I was a college freshman trying to balance getting drunk every other night and studying on the others. By the second semester I got my act together and really began to enjoy it.
It was no cakewalk though. It involved a ton of memorization, and I had to study probably twice as much for it than for my other classes. But it was worth it. Even though I don’t remember a lot of it 10 years later, I still recognize root meanings and that’s been very helpful.
Romanes Eunt Domus!!

I hate to be the spoilsport.
But , you see, I remember “doing” Latin in elementary school in England.
I can definitely say that Latin helped me understand English–both grammar and word roots.
And I can definitely say that studying Latin is worthwhile.
But I can also definitely say that is isn’t a whole lotta fun.
Here’s an example: the word “this”. In English, we have 4 variations. (this, that these, those.) In French, I think there are three (ce, cette, ces).
In Latin, there are no less than thirty. And there’s no easy way to memorize 'em. There’s no system or regularity like there is with the declensions of nouns, etc.
But studying Latin is rewarding, and , in a weird way, sort of satisfying…
Good luck!
The way I’d always viewed that scene was not that it was a criticism of the language, but rather a send up of the schooling experiences of the Python crew while they were in school. As such the Legionaire isn’t actually so much acting as a Latin teacher as he represents a certain kind of teacher.
To consider a modern analog - look at a Frenchified English tag that someone’s made using babelfish, or some other online translater. There are going to be grammatical errors there, I’m sure you can imagine your first French teacher trying to make someone work through to the proper grammar in just the same way the Legionaire did.