WELCOME! to the forum.!
You are right, this is trial and error, you'll need to experiment 'till you find what works for you.
Hang in there for more suggestions.
Much success to you as you fine tune and continue your CPAP therapy.
I'm a newbie too, and I have the same problems in finding the "Goldilock" settings for heat and humidity given the bedroom temperature and humidity. The trick is to get it adjusted so that you have very little condensation and yet very little nasal/throat dryness. I'm still experimenting with that. If you don't already have one, get a ClimateLine hose. It was a big help for me.
My doc gave me a starting setting of 8, and told me to change it to 9 during my followup. I find it very easy to breathe at those settings - pleasant actually.
I'm also still fiddling with the mask tightness (nasal mask). When it is adjusted right, I can't even feel it on my face once it gets to body temperature, and that's a pleasant surprise. I never thought I could get used to wearing a mask on my face while sleeping.
After about six weeks of use, it is now part of my normal routine, and I wouldn't think of sleeping without it. Good luck.
If your only problem is condensation (rain out) in the hose, it can be solved by rerouting the hose. The hose needs to have no low spots in it for the first 1/2 to 2/3 of the hose length. I have my CPAP on top of an attache case I layed down on the floor. I run the hose up to the top drawer in the 3 drawer dresser next to the bed and clamp it there with the drawer and then run it over to me on the bed. With the hose going up for several feet, if there is condensation in this length, it just runs back down into the humidifier tank and does not collect in a low spot and "gurgle". Some people run the hose up over the bed headboard. Some use commercial hose hangers.
Another fix for condensation is to insulate the hose. People have used old socks, old towels. commercial hose cozies and in some cases (like mine before I got the heated hose) we have also had to pull the excess hose length up under the covers with us.
What I think is the nicest fix is the heated hose.