MYSTERY MAN **a bit long* sorry

So I’ve been txting & talking on the phone with this guy for 3 weeks now. We haven’t seen each other yet but we are planning to meet this Friday... I’m 31 he’s 40. He says he likes me & he wants to meet Friday for coffee. We have no idea what each other looks like beyond what we described via phone conversations. He seems nice.. I’m a little nervous... but I want to meet him... never met anyone in person through online dating before.. any advice?