nervous to work at a hotel front desk

hi guys I'm coming off of a time where I haven't had a "real" job in years (I did doordash) due to immense anxiety as well as pmdd which took over my life for a while. I'm starting a new job working front desk at a hotel. I just had my first shift today and I'm really overwhelmed. I think I can do this but it's a lot of new information and I'm honestly really scared to be by myself in the hotel during the evening (3-11 shifts.) I know I can do this but I'm still scared. Has anyone else been in a similar place and overcome these feelings?

edit: I think I'll potentially be by myself working in the next week or so which increases my fears