I want to lose 100 pounds this year. I feel and look so Big! But don't know where to start. I Love…

I want to lose 100 pounds this year. I feel and look so Big! But don't know where to start. I Love carbs, starches, and junk food. 😭😭😭😭😭And wanna change my look so once I lose weight I'm getting my hair a different color and getting it chopped off shoulder length instead of butt length lol. I feel I can't do it now cause it wouldn't look right with my double chin lol. I've never been 270 in my life! This is embarrassing I let myself get like this. I feel like an oompa.