If interested in animation and Julia you might wanna have a look at: https://github.com/Wikunia/Javis.jl
We are currently working on v0.3 with a cleaner syntax. Coming in about a week
Okay for coding I what say: practice practice practice :D
I personally learn best when I have an idea and I want to implement something specific. Can be big or small. Best are the ones which are very extensible.
What I do as a mentor is to review code and give feedback. You probably don't wanna learn julia though. You can get some starter feedback at exercism.io Maybe you can ask there as well if someone wants to mentor you for some cash.
Not directly a mentor but maybe a study group helps? Have you done some internet courses on some topics? Maybe try to connect to the professors. They might have good students that can help you out.
I think finding a mentor for coding stuff is one thing but getting a good background of CS education is harder. Hope you find someone :)