I just started going to the gym for the first time 2 weeks ago.

First day I said "I'll do some dumbells. Where should I start? 50lbs?"

Mistake.

I kept sizing down on that first day until I could find something that I could lift on each arm for 20 reps. Then I take a 5 minute break. And do another 20.

I had to keep sizing down until I got to 10. By the middle of the week I got to 15.

And then this past week I got to 20.

I tried the 25, but tapped out around 13 reps. So not there yet. Maybe this week.