Im i to old to start mma and still make it pro?

hi, im 18 years old, ive wrestled for about 4-5 years and i want to get into mma but before that i want to start training for awhile in muay thai or bjj for awhile or just attend a mma place. My question is im i starting to late? and if not can i still be a decent mma fighter and maybe make it to a good organization one day? Does it all depends on how fast i pick up on stuff and my toughness? will not starting at a younger age affect me?