For me, a session starts with like an hour long shower, doing a deep clean (mostly because I enjoy it, not cause it's truly necessary) and doing some body shaving and just getting nice and relaxed. I usually then get some level of dressed up (cage at a minimum), and then I get started fucking myself. I built a dildo mount rig that's basically a pillar that I can adjust the angle on from horizontal to vertical with a padded base for me to kneel on. A session usually goes like 40-90 minutes, but my longest has been like 4 hours. I wear the cage because I'll lose my self control and want to cum early in, but that kills the horny and ruins the session. This way, I'll have to interrupt what I'm doing and go back over to the shower if I want to cum, and I really don't want to stop hahaha.
I personally find the difference between a good session and a great one is all in my headspace. Getting dressed helps with that, I usually do thigh highs and arm warmers at least. Making cute moans and whimpers helps too. I also usually read erotica while I'm going, half to fuel the fantasy and half because my adhd brain can't just do one thing at a time, no matter how great it is.
It's been kind of a weird time, going on this journey of self discovery and finding out how subby I am and not having anyone to be subby to/for lol.
I wish the best for you in finding that special person you will submit to in your future. Take your time to develop that trust and bond - it will be very rewarding...