Any suggestions

My husband and I recently decided that it's time to start actually trying.. I've been off my BC for about a year now and nothing has happened. we don't use anything while having sex. I don't know if I should go see an OB about getting pregnant or what. I'm new to this its a big step! I'm terrified of not being able to have children because he wants them so bad.. he has low testosterone and takes a shot every week for it. I'm not sure if that can lower sperm count or what. I guess I just wana know what you guys think I should do. I'm not good at throwing my personal info out in the open lol. Any suggestions or comments would be great! Thanks. also can someone post the lingo for all this information like I know some but not all lol