After going no-contact with XABF, I did stay isolated too long. (He had managed to completely isolate me, no friends outside work).
I started reconnecting with relatives and old friends, to undo some of the damage and build some new bridges. I also went out a few times with neighbors in my apartment building, and had some fun with them. (They are all widows, so there was a giant age gap, but it was fun for me, and safe.)
Then I started spending time with people I met through my recovery process, because these people understand what I am going through, and so we can talk about recovery or just do fun thing together.
I did eventually go out to lunch with someone at work, to dip my toe into the dating pool again. In my case, I am glad I did it, because it helped me let go of some things. That said, I'm not in a rush to do it again, I have other things to work on right now.
Do what is comfortable for you, when you are comfortable doing it.
Just don't cling to what's comfortable and familiar because it's familiar, get out and do things that make you happy.