That navy is the right call, the contrast with the lighter uppers keeps the room from feeling like a cave and it’s way more interesting than just doing all one color

What I’ve learned from painting cabinets is prep is basically everything, don’t skip the degreasing step especially around the stove area because kitchen grime is sneaky and will mess up your adhesion

If those are wood and have any grain you might need a grain filler first unless you want the texture showing through, some people dig that look but if you’re going for a smooth modern finish it’ll bug you later

Take the doors off and set up a little spray zone in the garage if you can, brushing cabinet doors flat is a pain and you’ll see every stroke in the right light