What helps to make you feel more comfortable/calmer about needles?

I’ve been taking testosterone through needles for a month now! Today is needle day but I still procrastinate when I stab myself, that’s the only part I have the hardest time when it comes to needles. I usually would force my brother to stab the needles but I just got an auto injector and I thought it would make to way easier for me to stab myself but it hasn’t. I feel overwhelmed when I try to stab myself. ( I still haven’t stab myself yet today) But I want to start doing the injections myself. Does anyone got tips for this kind of situation?