2 Songs Worth of Free Weights?

MsCzar

Back in early 2020, I began doing moderate cardio for 5-8 minutes every other day. Nearly two years and 85lbs/6 stone later, I can easily manage 30+ minutes of fast-paced cardio daily.
Well, it's a new year and time to start another new habit. I've got two 15 lb. dumbbells, a weight bench, absolute noodle arms, and with luck, juuust enough patience to maybe make it through about 7 minutes (2 songs) of upper body exercises. What are some good beginner's moves to start strengthening my arms and create a new daily habit? It can be different exercises on alternating days - but I want to do some sort of upper body strength training immediately after my daily cardio.