Welcome Ben!
I must say, from a personal perspective, I always loved buzz cuts and shorter hair styles. But as my hair on top got thinner and thinner, I found that I had to go consistently shorter and shorter to make it look "uniform." I too got really depressed over how it was just thin all over the top and missing at the back.
Finally, I said enough is enough after opting to get in the chair and get a super-short buzz cut. I was thinking "listen, I am so close now why don't I just go all the way?"
It was scary, I was certain I was making a mistake, but then I cleaned up and felt the smooth scalp and was like "hmmm... this isn't so bad..." and it's actually helped me carry myself with more confidence now - something I felt uneasy about before when I was feeling that sad feeling of not looking as young as I once was.
Hopefully all the support from the sly guys and gals here will help you feel more confident in whatever choices you opt to take!
-gary-
