Hi MyOwnRabbithole:
Starting with a few things, like you've listed, sounds like a good way to start. You can make more changes later as you feel need.
I'm at the beginning, like you. My first plan was to eat according to the government food guide. I make sure I get my meats, dairy, veg and fruit in for sure, and the carbs if I need them. So far I haven't maxed out my "allowed" carbs yet. I find them easier to go without and the veggies keep me full!
I've got kids too. I've tried counting calories and measuring but it makes me very possessive of my food, which then makes me feel badly. I want to share off my plate if they ask ( especially if its something they normally won't eat!) so I don't measure anything anymore but from much experience I have a good idea of portion size.
Start small. You'll build from there
there really is no right way to do this - it has to work for you and your lifestyle. As long as calories in is less than you burn you'll end up a looser