u/Emergency-Squash-902

I received my first set of vials today. I'm nervous about when to do my first injection as I've read there is somewhat of a timeline on when the naseua hits, and I work full-time. I have Weds and Thurs off I'm thinking of going for Monday because I've read about 72 hours later is when to expect the worst of it. I also have never given myself any kind of injection and I'm curious as to where and how I should administer the injection. Any suggestions?