Both of mine also transitioned to 1 nap at 12 months, despite the fact that they had both been very different nappers/sleepers for the first year.
DD transitioned quite smoothly, I just started pushing her morning nap later when she started to fight her afternoon nap and soon she went from 2x 20-30 min naps a day to 1x 1.5-3hr nap (bliss!!).
DS took longer to fully transition. He had always needed more day sleep than DD and wasn't sleeping through yet, so some days he would still crash out on the way home from the school run or need a little afternoon nap.
At about 12 months they both stopped wanting to be rocked to sleep as well. I could just put them in their cot, dummy in, cuddly toy and shut the door. This didn't happen until they were ready though. I had tried everything previously to get them to self settle but I couldn't 'make' it happen.
If bub is about 10.5-11 months, I would hang in there for another month of just going with the flow - I know, another month feels like an eternity right now! Keep an eye on bub and when they seem to be staying happy longer in the morning or fighting the afternoon sleep as then they should be ready to fall into having 1 nap. If bub is about 11.5m, then I'd start pushing that morning nap later now. 1 long nap is soooo good when you have a school aged child!