Attention Yun players!

I’m a huge street fighter fan and i mostly only played street fighter 3rd strike and alpha 3. My 3rd strike yang was competitive but i recently decided to buy SSF4AE and its a huge different from 3rd strike. The combos seem very sensitive and zoning/turtle is very effective in this game. I’m used to rush down and win but i must adjust to this game. Any tips since i want to use Yun. Also any tips on how to play this game will help as well.