kòman pou mwen di "i will be able to eat/je pourrai manger" nan kreyol? eske mwen ka di "mwen pral ka manje"?

It would sound better with the word kapab.
Mwen pral ka... may come off as if you were saying I am going to the house of ...

I'll be able to eat.
Mwen pral kapab manje
M'ap kapab manje
or
Mwen va kapab manje
Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words