Hi, I'm new, but thought I would chime in as this has been on my mind lately as well.
I think it is kind of hard to make a blanket recommendation with something like this. Some guys could be ready to date in under a year, some guys might have gotten blindsided by a MA and need 3 years. I do think the advice to wait until you finalize your divorce is sound, but, if the STBX starts dragging her feet and the proceedings drag on, then maybe.
I do think at 5 months out you probably need to spend some time rediscovering yourself and what makes you happy. Chances are you lost a lot of yourself over the course of the marriage and you should probably take some time figuring out what you like again. FYI, sitting at a bar doesn't count. Camping, Hiking, Fishing, NASCAR, New Clothes, Making Lists Where Every Word Is Capitalized, idunno. Go do some stuff for you that won't be a factor in the divorce. Like buy a fishing pole, not a bass boat. Get a message once a month. New running shoes. Join a Brazilian Jiu Jitsu place. Something like that.
Even though things are a mess, your STBX has kind of given you a gift of freedom that you didn't have when you were married. Don't squander that chasing tail right away.