My number 1 tip for learning graphics is to teach yourself whenever possible. Courses and classes are great, however self-teaching is definitely the best method for learning graphic design at this level. Instead of learning everything all at once, it's best to learn as you go along. YouTube is a great resource for tutorials and tips, and I advise that you check these out a lot, but it is also important that you experiment on your own and just pick up little bits of information and tricks as you go along.
Feel free to PM me at anytime and we can talk about graphics, because I'd be happy to help you.