Just reporting back to say that I did successfully ride up 41st street this morning. Thanks everyone for the advice and encouragement!
Steve O gave me a good piece of advice last week that helped a lot and that I haven’t seen written online anywhere, so I’m writing it here in case it helps anyone else: right before the super steep part, there’s a flat little driveway/cul de sac off to the left. It helps a lot to turn in there and use it to get a running start up to the switchbacks.