Short film simple edits: Stabilize and Small Background Removal

Our short film is edited and almost done. But before we color and add sound, we want to stabilize some of the footage (done well!) and remove a person walking in the background for a few seconds, and a bit of a boom shot, and something else like that. Simple stuff, shouldn't take long. You'll also get credit in an awesome short film!
Best if you know Davinci Resolve (don't use premiere stabilization, it's not so good).