I study using a variety of tools including: reading books, watching videos, reading CardsChat forums, membership to poker training sites, reviewing
hands that I see on tv and also my own hands, poker simulation tools/games.. the list goes on and on!
I do watch youtube but I am careful as there are a lot of videos that make claims they will help, but how do we know that they are actually good videos? I try to stick to watching the pros that I know have been succesful
Nope, never done UpSwing beyond the free membership. I do think that paid poker training sites can be good. Recommend looking at someone that works with CardsChat like Ryan Laplante and
https://www.learnpropoker.com/
YUP! I read a lot of books and articles. The first book I read was The Theory of Poker by David Sklansky. It is an OLD book, but I learned a lot from it. Now, I study more recent books.
Finally - you didn't ask about playing. PLAY. Play for free, you'll still learn a lot and become comfortable.
Only you can determine where you should start. We all learn differently. Good luck!