That's actually a pretty good amount of riding in the first seven rides. What I or any other cyclist does now doesn't relate, but what were our first rides?
My first ride (wife's car wouldn't start at the grocery store and I was about 48) was an epic 2.5 miles, and I'd have bragged if anyone would have listened. We started riding now and again, around 4 or 5 laps of a flat 1-mile loop in the park, and there was nothing wrong with being proud of that. So, personally I think you're doing great.