About to start the journey

Hello-
I have struggled with my weight forever. I have managed through exercise much of my life but a year and a half ago I was in a bad accident that lead to a severe concussion. This was pivotal for me in gaining a ton of weight. I could no longer exercise and was in a horrible food cycle.
I'm slowly recovering-still. I asked my doctor for support to help me lose the weight but I'm nervous about loose skin and all of the things that go with it. I am hypermobile and so my connectivity tissues are not amazing.
What have your results looked like?
What ways do you manage loose skin?
I probably have about 100 pounds to lose.

I should be getting the first pen in the mail friday.