Hi Powerbuns, and welcome to the forum.
I have hypothyroidism as well, and I know something about how difficult that can make everything. (I'd suggest making that a priority- you won't know yourself when that's under control) Unfortunately I don't have or know very much about diabetes, but there are people in this forum who discuss it.
I wish you the best of luck with weight loss! Have a browse around the forum for ideas and advice- particularly the diaries and the stickied posts.