Officially welcome to the site Maxwell12, and to a great game. EX Kyo and & Iori are very good in this game now; not overpowered, but have the skills to keep them at mid/high tiers.
To me, a lot of the cast has good hit confirming; just like SF, you'll generally want to start with low, weak punches or kicks most of the time. I might start with characters like Terry (target combo cr.A(x2),cr.C), Ash (charge character), Shen, Yuri, Mature, Duo Lon or Kensou (good rekkas). Others might have different suggestions for easy hit-confirming characters, but I think it's mostly a matter of style.
Hope this helps for starters.