Question about my injections

I am a minor and I ran out of my stock of testosterone the other day and i can’t get it refilled for a bit due to the government. My stepdad (cisgender) takes testosterone as well. I take Sub-Q and he takes inter muscular. My mom gave me a fresh vial of his but I’m not sure if it’s safe to use. His bottle says “for IM use only” so I’m not sure if I can do sub Q with it. My only other option here is to do an IM injection for a couple weeks until I can get this figured out. But I’m also not sure if it’s safe to just suddenly switch how I inject.

I am highly aware that this is medically unsafe but I don’t really care too much about that. I’ve been on T for a year and a half and I need to keep doing my injections even if it’s not medically recommended