Hi MLeigh, as you know, I chose not to date whilst still married. But my XH did file relatively quickly, so I haven't been in that situation of being long-time separated.
The way I see it, at this point you are choosing to reach out to guys and see if you enjoy spending time with a particular one. That may mean you are meeting up for a coffee with one guy and a drink for another - very much on a casual/friendly basis - socialising with a member of the opposite sex. I don't see any particular need to tell your H about that.
However, if you do meet a particular guy and want to become exclusive with him. Maybe you want to introduce him to your S, or meet his kids if he have them. Or maybe have him stay over?
At that point, I think it would be a good plan to let your H know. 'I'm seeing someone, I plan for him to meet S etc.' Because I think at that point, it could well change the parameters for your interactions with H and it seems fair to let him know.
But until or unless, I would socialise with some new guy friends and enjoy yourself xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus