Hi!

i heard the simple acc you can only lvl to lvl 38? is that truth? anyone could give 100% information?

No the account dont matter full acc is for cash shop

Yes, no matter which account you have you can play the game. The level 38 is the level cap that has been put into place for the open beta, maybe just some of the open beta. The Full Account is used to buy stuff from the cash shop (Real Money).