Is it me or the bike?

Not being able to go to the gym, I decided to get myself a road bike. After a good two to three weeks of shopping around, I found a used CAAD10 in my area and picked it up.

I just went for my first ride and loved it. I had a little bounce when going fast so I need to fix that, but otherwise felt great.

Besides one thing. Just about every time I push in the top left lever it seems like the chain went loose. If I click in the bottom left lever right after the top one, it goes right into place. I’m still learning shifting and was itching so bad for a ride so I thought I’d try and learn on-the-go. Thankful for all of those squats because otherwise my quads would have been totally blown out from riding in wrong gears haha..

Is it the bike, or is it me?