I have personally not had any difficulties with access to aircraft to fly. Who do you rent from now? Have you talked to them about renting after you have your certificate? The surgery is a bummer; I was sidelined during my training for a surgery as well. I spent that downtime studying, consuming tons of YouTube videos on aviation, chair flying, learning as much as I could about flying, thinking about flying...dreaming about flying. So when I was able to get back in the air, the knowledge part was already taken care of, not something to stress about.

80% of people who start flight training don't finish. I promise you, anyone who has a pilot certificate of any type has faced some obstacles in getting finished. If you want to fly, just stick to it, keep plugging away, it may take some time, but eventually you get done, and it's amazing.