Welcome
Yup first thing's first get a decent scale (doesn't have to cost a fortune there are some cheap digital ones out there) and weigh in, then decide what works for you
For me the best thing was slow changes, once the junkfood was gone I stopped buying it, then I started to work out more, then I cut out anything that wasn't water pretty much. The slow changes have made for permanent weight loss.
Oh and you don't have to be perfect- making a "mistake" doesn't mean binge for the rest of the day, not working out one day doesn't mean quit working out and so on. It's progress not perfection! Good luck.