How to repay my parents?

First of all, I just want to say that my parents are the best parents out there. The title sounds misleading, I know. They are extremely loving, supportive and kind. Never make me feel like I’m useless or a burden. I’m lucky and extremely grateful to have them and for them to have given me a comfortable enough life where they can pay for my education, basic necessities and buy me a commodity such as a Videogame or book here and there.

However, recently I’ve started to feel like I’m kinda a waste for all the money they spend on me whether it’s my college tuition or a $20 game. I don’t have a job since I’m completely focused on my college career and my parents think that way too, they don’t pressure me into getting a job and that my main focus should be getting a degree. They have told me countless times that they don’t want to be repaid for anything they have bought me but I can’t stop feeling like all I do is take their money and not giving anything in return. Like I’m useless. I feel like I should help with things such as groceries or paying the electricity bill. Maybe even buy them really nice gifts with my own money. I want to help them for all the things they have given me. I’m just unsure how.

I suppose the obvious answer is just getting a job. I’m just scared that, with college responsibilities, I can’t keep up with all of it. I feel like such a kid sometimes even though I’m legally an adult and I suppose I am one haha. I’ll look into getting a job soon.