First thing is just getting in the habit of working out and making it routine. It has to be something you look forward to or you'll just blow it off after two weeks and never do it again.
You've got some basic equipment, so, what did you like to do as a kid or as a teen? Any sports or track?
When I wanted to get back in shape I had 15lbs dumbbells and bought a heavy bag because I had a martial arts background. Found a home DB routine off Muscle & Fitness and worked the bag after.
After a month, wanted to get stronger, so bought a barbell set, a rack and Starting Strength. Couple months later, found I really liked the Olympic lifts. Bought a proper bar with some bumpers and built a platform. That was 12 years ago. Still look forward to getting home and lifting.
So, what will kick start you? Search home dumbbell routines and find one you think you'll like. Or download a CrossFit app and sort just for DB workouts and get surprised every session.