I suck at my job. Any advice?

So im 20yrs old and work part time as a cashier(apparel, sports, and outdoors store) I’ve been working for about 2 months now, I don’t get many hours so in total I’ve worked about 23 days…

I keep making mistakes and keep asking the dumbest questions. I’ve had two sit downs already with my manager and each time I feel even more dumb and useless. It feels like my co workers are tired of correcting me.

I’ve learned many things along the way but it feels like every day I give them a new reason as to ”baby me” or constantly be watching me.

This is my first job, so I don’t know if I’m overreacting but honestly any type of encouragement or advice would help.

If anyone has had similar experience to this pls help. I just wanna know if this is common, I really don’t want to quit or be fired.