Stacey is very knowledgeable, so please listen to him. Here are a few other observations…
First, I suggest you keep everything in your
therapy thread. Much easier for folks to find the information needed to help.
Second, you have a lot of leaks. You need to get those under control as half the nights therapy is lost due to significant leaks. I don’t know what kind of full face mask you have, but look up some videos on YouTube to see how to properly fit it. LankyLefty27 does a lot of good videos on mask fitting that may help. Rather than a cloth full face mask consider trying a Resmed F20, F30, or other FFM. It may help.
Third, Something is wonky with your pressure. I’ll leave it to Stacey and others to recommend what pressures to try, but it seems that you need more pressure to handle the H and OA events. When you have a higher pressure H are not very present and the bulk are OA. My guess would be you need a min of 8 or 9 and max of 15 with flex of 3, but lets hear from others far more experienced.
Finally attached is a chart that may help with your collar sizing.
Good luck!