How to fill in gap.

I’m sorry if this has been asked before but I’m wondering how to fill in my job gap. I’m 24 the only work experience I have is 2 years cashiering. I do have an associates degree but it’s pretty worthless and am working on a bachelors. The reason for this gap is I have severe social anxiety and chronic depression. Can I say that I was a full time care giver to my grandparent to fill it in even though it’s a lie. I know they say not to lie but I finally have gotten help for my issues and really want to work. I need to work. I didn’t ask to have any of this mental crap but it really consumed my life. I’m just so nervous of never finding employment. Any insight is appreciated, thanks.

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