Welcome! I'm also a 28 year old SAHM to two little ones (3 & 2).
Take a look at the different subforums and you'll see that there are a TON of different plans out there, so you'll need to decide which will work best with your tastes and lifestyle. For me, calorie counting is the way to go. I want this to be a lifestyle change and with calorie counting I can eat what I want in moderation.
Joining a gym with on-site childcare has also been a Godsend for me. I found that if I get in a good workout early in the day, I'm much more likely to eat well. It also gives me a break from the kiddos and an hour to focus on ME (as a SAHM you know that "me" time is rare!)
MFP (My Fitness Pal) has been a great tool to help me track my food and exercise each day. They have a website, but I mostly use the app on my iPhone. Good luck!!