I understand the frustration of trying to communicate with someone and not getting through. That teaching experience was teaching English, in China. Broken or confusing English is something I'm pretty used to.
But don't be discouraged. Focus on what people are doing right, be encouraging and explain things in as simple terms as possible.
As to me, I am a bit older, 31.
I decided quite late to get involved in art, maybe 24. I used to draw a bit when I was a kid but I never considered it as something worth pursuing. I had wanted to be a writer. Which is probably why my comments are so long.
I would one day soon like to make money from my work, but I haven't figured out how just yet. I am hoping to build a body of work that looks impressive enough to get attention, hopefully build a webcomic as well. Patreon is the goal at the moment, but I need to build a much bigger following, and a lot more work, before I consider getting involved in that. My dream job would be to visual development for an animation studio, but that is a long way down the road, I think.
I would also like to teach art. I understand the fundamentals pretty well, and have a fairly strong grasp on a lot of digital specific techniques, and I would like to share that with people. Help them with things that I used to struggle with and had to work out on my own. All of what I know is self taught. The art school I attended was like a community college, and it wasn't very good, so I had to do things the hard way. Sure there is a lot of information and knowledge online, but there it can still take a long time to really understand it, so if I can help others, I would like to.
I just need to keep working at it.