Hello Moomin (I used to watch The Moomins too)
You've made a big first step by joining. Keeping a food log is one of the best ways for finding out where we are going wrong.
I hurt my knee jogging at 230lbs so there's another thing to consider when thinking of cardio.
You might want to consider lifing as part of your routine. A lot of women don't want to become 'big' but in all honesty it's extremely difficult for any woman to add significant muscle mass.
There are lots of helpful people on this site and many have lost 100lbs and more so the help is here. You already have the mindset - I know you can reach your goal.