It would help if you said what your rough budget for said boat would be, as well as what kind of sailing you intend to do with it.
There are lots of boats that would be suitable, but the type of sailing you want to do will influence your choice a bit. Also, are you willing to sacrifice living space for sailing qualities??
A good place to start would be James Baldwin's boat list
. Be aware that his boat list focuses on boats that could be decent pocket bluewater passage makers. The coastal cruiser variant of boats would give you significantly more living space at the cost of some seaworthiness.
As for singlehanding a boat.. an autopilot, lines led aft to the cockpit, proper traveler design and mainsheet location, are all going to make a boat easier to singlehand. However, I generally recommend reserving a decent part of your boat buying budget, 15-25% depending on the budget, for upgrading, repairing, and modifying any boat you do purchase. Most boats will require some work to make it work for you, since the layout of a boat's sail controls is often very specific to the individual sailor, more so if you're singlehanding the boat.
I'd also recommend you read the POST in my signature to help you get a bit more out of your time on sailnet. Welcome to the asylum.
Good luck and keep us posted.