Late welcome, Alyssa!
I’ve been lurking on this thread as my 235 came to me with similar squawks. My fuel quick drain on one of my tip tanks is finicky and leaky and you really have to play with it to seal after draining fuel. I first tried just cleaning my quick drains (they were filthy!) I purchased a couple of new CCA-1550 Curtis drains but haven’t installed them yet (had a mess draining fuel, so flying to burn the fuel out a bit). Install looks easy enough, I have the special socket for the CCA-1550 as well as the sealant for the new quick drain thread. I’ll see how a new one goes.
The other is the main struts. I had them both serviced as soon as I got the plane because they were collapsing to full compression during taxi. One of them still seems “leaky” (a little dried strut juice from the left main strut service port on top of the wing after every flight). I want to try Granville’s next. The A&P that serviced them didn’t want to use it (!), so I’m going to go to another A&P that will. :/ After that, full rebuild would be the next step.
I will say, after the mains were serviced, they feel like landing on pillows now. So that’s good, right?
I’m kinda in the same spot you are. Got my ticket back in March, bought my 235 and now building hours while studying for IFR. Best time I’ve had since I learning to SCUBA dive. 😉
Enjoy the plane!