I relate to this so specifically. I worked part time retail during college and although I hated it I had no problem showing up and getting my job done. Before I went to at college when I was 18/19 I worked full time and had no problems either - I think my mental struggles were more sparse and less intense/prevalent in my day to day life back then. Since leaving uni I landed a full time job and ruined it, I was turning up but I was struggling mentally with working full time so much that it was causing problems which management were picking up on, causing a series of small disagreements and eventually I walked out after I didn’t like how I was spoken to by a member of management. I’m now worried I won’t be able to settle in a job and do my best everyday because not having enough time to myself affects me SO much and that’s before the premises of the actual job and how my colleagues and management treat me are added to the mix. It’s exhausting but we must carry on, I was having a really bad mental health week recently where I couldn’t function or do much but I told myself I have to fight this and you have to too. Deep breathing and meditation helps with the constant fears and doubts. Good luck.