Winter camping is a blast but a huge learning curve from 3 season camping. I have a few thoughts to share with you regarding winter camping experience that you can consider for yourself or not. Reading and experimenting doesnít cost much but some time spent doing it.
You can start out by testing your ideas in the winter/cold in your backyard or a controlled camping area where you can exit safely and/or gracefully exit if things go awry.
Watching some of Shug's winter videos showing winter gear with how's and why's as he does a great job explaining the reasons and benefits. Shug also has a great vid that showcases an idea using a sleeping bag as a peapod as he wraps his whole hammock and tests it.
A pulk sled will be a necessity if you are packing into the wilderness any good distance. Plus a pulk sled will be more forgiving bringing and carrying maybe not so ultra light and heavier, bulkier winter gear. (There's alot of good DIY info here on how to make one).
My first winter outing I found that the pulk sled was hugely important, of course clothing too but footwear was a big challenge to dial in for me. Depending where you go and the snow conditions snow shoes maybe required.
Lastly as you mentioned getting with a group of winter hangers/hikers will give you a wealth of information and speed up your learning curve tremendously.
Here is a few winter Shug Vidís worth watching although there are plenty more to view and learn from. Enjoy!
Good luck with your winter camping quest. Perhaps I'll see you on some snowy montain top someday.