Don't get too wrapped up in size. A 22 foot boat not set up properly can be harder to singlehand than a 49 foot boat that is.
Lead your lines
aft. Get some lazy jacks
, a roller furling jib
and an auto pilot (FWIW, I don't have one but it would be nice). Set up your slip with some lines
to prevent the boat from running into the dock should you miss the line
. Learn how to use a line
amidships to catch a dock cleat
and tie up the boat until you get the rest of the lines on. Have plenty of fenders
Once you do it a few times, it'll be no big deal. Take another sailor with you who's instructions are to just ride along unless you really need a hand if it helps you feel better.
If I can single hand, anyone can.