I tried answering adverts in the days before online-dating; I didn't meet anyone I wanted to go on seeing, but others I know did.
At the time, thirty something years ago now, I made a point of meeting for coffee, someplace in town, and I took the precaution of having, or saying I had something planned with a girl friend later that same day. Usually, too, I arranged either with a girl friend or one of my gay male friends, that if I had not phoned them to check in by a stipulated time, they phoned me, at home. If they got no reply, they were to go to the café, where I had met the person, and try to find out if I had left there alone, or with someone.
I never needed all this precautions, but they made me feel safer.
Nowadays, you don't even need to give your telephone number to a complete stranger. I would suggest, if you do join a dating site, that you get yourself a new e-mail account that you only use for the dating site, so there is less risk of anyone you don't want to go on seeing, tracing you to your address.
Good luck finding someone nice.