Places to check if older guns are still safe to use?

I'm sure there was a more succinct way to word that question, but I have an M1 Carbine from my grandpa that I would love to shoot, but I definitely won't try until I know it's in proper working condition. Any places that I can take it to for a check and maintenance instructions? Preferably W. Houston, but with something like this, I'm fine going anywhere.

Thanks in advance!