Still Depressed Despite Getting A Job

I moved to a new city in February, and have essentially - there was one blip in May where I got a job but was fired after a week - looking for a job the whole time. On Friday I was offered a job as a receptionist (I don't really have any marketable skills). If I accept (I don't know what to do!), it would be my first real job out of college (I'm not counting the week I worked in May, obviously). I don't want to not accept, but at the same time I have this horrible anxiety that I won't be able to do it! It's a vicious cycle. I got so used to interviewing for jobs and not getting them that that became my norm. That was my end game. Now I'm going to be working full-time, which will be awesome, but I don't know how to handle it.

Might as well accept and try your best. I would not turn down a job in this economy. My bf's been looking for full-time work since he graduated college 2 years ago.