Speech therapy?

My son is 3 in August. He isn’t talking much he still mostly has gibberish talk. He’ll say some sentences like “I don’t want it, I don’t like it”. He’ll name stuff like plane, bug, train, iPad. He’ll repeat words after me if he feels up to it.

I’m not sure what to do for him? We don’t have a family doctor, we’d have to go in clinic to get him referred if he needs it.