I hate being like this

I made a mistake , a mistake at work with a client , I feel so ashamed , thats why I wanted to quit my job so bad , because Im always making mistakes and I didnt wanted to do more. My lack of attention puts me in situations like this , but , its not something easy to control , my mind is kinda weak , I Just got distracted by other client (I feel like I can only focus on one thing at time , otherwise my mind goes Blank and I have a confusion ) Anyway , I made a Mistake , It wasn't out of malice , more like stupidity . I hate failing with others , It makes me dislike myself even more , I Just want to disapear , I already spend my days regretting things and now I have more to think about, I am too ashamed to tell you guys ( dont worry it didnt had consequences to the person, the situation was resolved ) but it still sucked .I hate being incovenient, I hate when this happen, I feel uneasy for days , and I cant be consoled because im in the wrong, and I cant vent to my mother because im afraid of what she will say. I wish I could leave work and try to get better before getting employed but my parents wont let me quit. Also Idk exactly how to get better , maybe training my mind by going out and doing different things ?? Or aplying to a simpler kind of work were i cant make such mistakes ?? Idk, I fear i will never be fully abled to work