Hey there
Welcome welcome welcome.
So if you want to ease into working out perhaps you should consider the couch to 5k running plan? :] I'm starting that today, I'm an awful runner so it should be fun :P They have an app for iPhone, too. :]
http://www.coolrunning.com/engine/2/2_3/181.shtml
I hope that doesn't get removed for any reason, if there's no link there just google 'couch to 5k running' and I'm sure you'll get the site.
Also, when it comes to how you eat, a lot of people choose to count calories. A lot of people don't. For me, it has been the easiest way to keep track of what I eat and stay accountable. When you're ready you might want to check out sparkpeople.com - fabulous website that has helped me more than I can even say!
I know you mentioned focusing on working out first, but I thought I'd throw that out there :3 Lots of people say diet is 80% of your weight loss. The way I understand it is 3500 calories=1 pound. You have to burn more calories than you consume to lose weight. Your body burns a set number of calories just by existing, so that's nice.
Most people (some people? I'm trying not to offend or assume here :P) use diet and exercise both to get to their goals. I really see it as a biiiig math problem, and that's what has helped me the most.
Anyway sorry for the rant. I hope you find all the help you need here! This is a fantastic community and I've learned a lot by being part of it, I hope you do, too
And congratulations on deciding to make this life change!
You can do it, you seem dedicated and realistic which are both fabulous things <3