Hi! First of all, beware of online dating (but I guess you took that into consideration already). After reading your post, one thing that I strongly encourage you to look for before even getting into another relationship is make sure you are happy with yourself and with your life in this moment.
I’ve seen way too many people (and was one of them myself) who look for validation in a relationship and inveitably end up with regrets or involved in bad relationships. The fact that you’ve waited so long before getting involved again says a lot, but if you really are happy with yourself right now I would just stop putting too much pressure on your next relationship and just experience and enjoy what you get. The worst it can happen is you get to know another person, share some time with him, see where it leads you and go from there.
Make sure you are clear with that person about your expectations and be honest with yourself on if this is really what you want.
Hope this helps!
Chris