Hi there! I am offering my services as professional GUI designer as well as gamepass logo designer!
I have touched on realistic GUI’s as well as cartoony GUI’s, which are most common!
I would recommend getting more practice before calling yourself a professional, also in my UX experience, when customers are charged more, then they usually expect to be shown the benefits of them paying more, using the exact same image for each monetary investment the player makes is not very appealing.
Moving forward, I think you should try to get a little bit more experience under your belt before calling yourself a “professional” also try to use a external program like Adobe XD, and not just studio