I think you are in the same place I was coming out of school a few years ago, so many options and so unsure what to pursue. But you are in a much better position financially speaking than I was at that age.
If you really want to be an adventurer, just go out and do trips. The way most make money is by taking on seasonal jobs from time to time doing menial work. This could be working as a tour guide/backpacking or other sport guide/cook/cleaner/waiter etc. You aren't going to make much money but that's not why most people pursue these jobs. Sometimes your room and board costs will be completely covered and you can sock away nearly 100% of your income. These are rockstar professions as Jacob would say. Meaning most of your coworkers will be from their early 20s to their mid 30s with a couple folks that are 60+. Most will be terrible with money, have a YOLO mindset and no grand strategy for life. They are usually great people otherwise and fun to hang out with though
Get wilderness first responder certified. That'll take you a long way.
There are only so many people who can make their money solely from adventuring and it would take a while for you to build to a sustainable level of income. Lots of people hike the AT and lots of people write books about their experience. But most only read Bill Bryson's account. Same thing with the PCT and Wild. It's a niche community and much more difficult to appeal to the masses. There are those like Andrew Skurka who has worked this well, tackling all the long trails and making up some routes of his own. Trip planning packages, guided trips, writing and speaking make up the most of his income but he worked seasonal jobs for years until he was able to build up a large enough income base.
Forget about sponsorships. There is no money in backpacking or most adventure sports besides those at the top. You may get some free gear from time to time but I wouldn't expect any monetary compensation.
There are others who are able to make a full time job work with lots of trips. I think this is the best route if you can swing it. These people are professors or work in the corporate world with generous time off allowances. It also provides the mental stimulation and thought that isn't quenched by analysis of gear or route strategy.
That's some of my thoughts. I haven't really been able to make it work as I'd like. I think it'd be best to have a base level of assets (like you do) then some type of skill that allows you to come and go as you please. That may take a few years to build to but then you'll have the rest of your life to wander while others who pursue a similar path are insecure financially, forced to eat top ramen or cat food and have to go back to some job.
Since it's winter, why don't you look south? Check out the Arizona Trail. That'd be a good start.