No need for grips till swinging big enough toward giants. Get a kip first and learn how to jump to high bar first without grips. File down your callouses and use tape grips and save them till then.
If you're fairly small, no need to even bother.
If you're having problems with grip strength, do more grip strength work.
Maybe, just maybe if your hands are inordinately small there could be some argument for using grips early but only if you're working big swing work which most compulsories are not till L6.