New rider

I am a new rider with a brand new bike. My throttle hand is getting numb when I ride for over 30 min. I am sure I am gripping too hard and I need to relax. but in the meantime, any suggestions? any special gloves? throttle grip size? No jokes on why my right hand is getting numb please, haha.

Edit: Thank you all for the responses. I really appreciate them. I will try the foam grips but I think I just need to relax and not grip the throttle too tight. Happy New Year