Hi kaskas67! I agree with Kendra79 on all points! Yay for being here and reaching out. Take everything one step at a time. Don't beat yourself up. Keep working at it. Time will show your efforts, so don't be discouraged!
My Fitness Pal is a really fantastic website/app and I find using it quite helpful. For example: I've charted and recorded my food before, but when I started with my fitness pal after about a week I realized that while I was fine with my calories, as I suspected, my sodium intake was outrageous, and the sugars were pretty awful too. I'd never thought about the effect excess sodium might have on me, because I just thought what mattered was the calories. Within just a few days of altering my food intake to reduce my sodium levels I noticed a huge difference.
Not knowing where to even start is tough! I suggest you start with a walk around the block (or an equivalent). It doesn't even have to be a swift walking pace. Go for a nice walk regularly and you'll find things grow from there without even realizing it. Start with committing to parking your car as far away from work/appointments as seems feasible. Start by deciding to have 2 cookies instead of 5. Start by adding a small side salad to your normal dinner. Start by adding a small healthy snack into your day, and watch as your appetite at meal times adjusts to new needs. Start small! It'll grow, and all the while you'll be building a new, long term, sustainable healthy life without stressing and causing more damage.
You can totally do this.