Thanks for the responses!

Getting professionally measured at this point might be tougher than normal due to COVID, but I plan on getting this done at some point in the future.

I also feel as I ride more I will eventually become more comfortable with the new seating position. However, that is kind of a double-edged sword at this point since I need to be comfortable in order to ride more, lol.

And you are correct, my torso is longer than average, but I'd say my arms are on the shorter side. I'm also a bit husky (230 lbs) which is part of the reason I am turning to biking in the first place. I know that being a bit heavier makes it tougher to ride in a more aero position. I'm hoping as I ride more and (presumably) lose more weight, this also becomes easier.

I actually just remembered that I have an adjustable stem from a long time ago; I believe it's 110mm with adjustability up to 60 degrees. I suppose that I could use that to help gauge what angle stem I would need, even though it is a bit longer than I'd like.