Get a digital food scale and start tracking calories and macros. MyFitnessPal’s free version is sufficient for this.
Be honest with yourself. Research an appropriate calorie deficit to work with. Realize that ~3500 calories is approximately 1 pound. Set some weigh in goals at the 3 and 6 month marks. Try daily weigh ins but only track the week to week average.
Not concrete advice, and everyone is different, but hope this helps.