Hi, for me when I started to learn playing fighting game "for fun", here is how I learn:
In Marvel Super Heroes vs. Street Fighter (My first fighting game that I started playing):
- Using Main character: Ryu and Wolverine
- Using Easy Mode control such as pressing an attack button, my character can do his special moves
- Mindless pressing buttons like a fool in many matches
- When Easy Mode is disabled, need to visit site like gamefaqs to read up how to execute moves, QCF+P, DP+P, QCF+PP etc
Other Fighting games:
- Using cool looking characters reference from Fighters Generation
- Look at movelist from gamefaqs or menu list
- Keep doing moves that are reliable such throwing projectile, dragon punch, performing super moves
- Perform some basic combos that are easy to execute
Now for serious play (tournament style) here is how I learn and it is way tougher than playing for fun:
- Using my favorite character that I like, I can also use reference from Fighters Generation website for the coolest looking character, but mostly in this top high level play style, several professional fighting game players use character based on top tier which doesn't work for me
I will not be having fun if I use character base on top tier unless my favorite character is top tier
- try doing all of his moves and make sure I can execute all of his moves perfectly on both one player and two player sides
- learning from top players video matches on youtube site and making gifs of it for my reference
- try performing those combos in training mode several times to memorize them
- try doing moves and combos on CPU opponents first and notice how it affects my gameplay
- for my case, I notice I keep on getting beaten whenever I keep on attacking my opponent
- looking and studying frame data of opponents and my characters
to see which moves are advantages or disadvantages to which moves and when is my turn to attack my opponent
- try it on CPU opponents first to experiment with it
there might be more, but this is how I learn to play fighting game seriously so that I might be able to play as quite the same level like those professional fighting game player, I guess