Maybe you can handle it, maybe not. You’re the only one to judge your skill.
I never rode a motorcycle in my life, so before I took BRC, I honestly didn’t know much. We had a mix, probably 75% Honda CB125Ts and 25% Honda Nighthawk 250s. I honestly found the power between the 125s and the 250s very noticeable. Also, the Nighthawks seemed a little heavier and more awkward to handle (makes sense, bigger engine.) I honestly didn’t find either underpowered at all. Both are more power than you need for going around a parking lot at 20 MPH tops.
This is coming from the guy who was looking for an Aprilia RS50 for his first bike (found some on eBay, but hardly worth the price and the pain of getting it from states away.)
If there was one thing I wish I did when I was younger, it was ride dirt bikes. It would have been a lot easier to learn to ride without cagers, I’m guessing.
Love to chit-chat, but I got riding to do.