@unicorninahaystack I think I may well be the expert (finally) in a subject. Some posters like @Italiangreyhound will know me as Kewcumber but I seem to have mislaid my original login details.
I adopted as a single 14 years ago and now have a newarly 15 year old (later this month)
I wasn't dating when I adopted and certainly wouldn;t have had the energy emotional or physical to date in the early years. In fact it wasn't until DS was about 8 that it seemed like a possibility.
Practicalities are fraught - DS has NEVER been babysat by anyone other than family or friends though obviously your friendship group changes with childrne so you may find they are fine with sleepovers withfriends - DS wasn't for a VERY long time. In fact he didn;t sleep through the night until he was about 11.
I dated during daytime when he was in school (flexible job) and the occasional evening when he was at my mum's from about 7 or 8 and didn;t introduce him to anyone until he was 13 when sods law we split up about a month later!
I now have a boyfriend who has got as far as staying the night and for weekends but it is incredibly difficult as of course your child has a premium position when there are just two of you and inevitably they get knocked back a bit. Even being incredibly cautious and taking things very slowly it has been tough on all of us.
You can absolutely date whilst you're being assessed and boyfriend will need to be assessed too, you also need to be very clear with him about the "rules" and SW needs to be aware you've had that conversation. If boyfriend is around in a friendly way and not involved in childcare from very early on, I suspect it won;t be a huge problem.
Once you are bonded with your child, you will inevitably make the decisions based on what they need, boyfriend and social worker both need to know that.
Single adopters don't need to give up all aspects of an adult relationship, you just need to be realistic about how that might need to change according to the needs of the child, just as it happened in marriages.
Good luck