Best tips for losing 100 pounds?

I am 33F, 5’8”, and 260 lbs. :(. From 2018-2020 I went from 210 to 135, then I gained up to this. I’ve been kinda trying to lose forever and I’m demoralized but I absolutely have to do it. Last time I did it through calorie deficit at 0.8 lbs. per week. I know what I need to do but I’m a bit burnt out and demoralized.

Best exercises? Best routine? Best foods? I kind of already know but can’t get myself to do it. For what it’s worth I’m at the gym now and just did 20 mins on the elliptical and am doing a little dumbbell session. I can’t seem to get myself to the gym before work, after is good for now I think. I’m at 1,900 calories for the day. I just need to stick to something and lose a chunk of this weight because I’m miserable and uncomfortable.