Let me be the first to welcome you.
My recommendation would be to start with Reta or Tirz to help shed that dad bod. Those are the current kings of weight loss and have a good safety profile. Since you are new to the peptide world, don't go stacking compounds right away. You need to start slowly and assess things. Plus if you encounter any sides, you need to know which compound caused it.
Muscle loss with Reta is real. You want to start on low doses and titrate up. Taking more than you body can handle at first will cause you to under eat, feel like shit, and cause further muscle loss.
Lets say you get a few weeks into Reta and things are going well. You started at 500mcg and up to 1mg. You want to add CJC no w/ IPA. Great call. This will help further with some muscle preservation by raising IGF1. Just be careful with this name as it has been known to cause some side effects beyond the injection site reactions. Anytime you start a new compound you want to ease into it.
Other compounds to consider would be MOTS-c and NAD+. I love MOTS-c once you have your foundation in order (diet, workout routine, sleep), but its another one you have to careful with b/c of serious reactions.
You may also want to consider some sleep peptides, like DSIP.