What would be a good bike for me?

I'm 15, about 5 6-ish and 125lbs, so not very big. I'm wondering what kind of bike I should get, I want something with good speed and for it to be comfortable. I'm just starting out, so nothing insanely fast. My dad has a 99 ZX-11 which I like very much but it's far too much bike for me to start on. I can lift it off the kickstand fairly easily but I'm not really comfortable in doing so as it has a heavy weight of 600 ish lbs. What should I start on? I'm in to any types of bikes, Honda CB series, Ninja 250 s, Ducati Scramblers, etc. Recommend me something.

Yeah, you're on the right track. Suzuki bandit is a great starter bike. Lots of parts available.

Yamaha Virago 250
Buy used. Your first motorcycle is going to fall over once or twice.

Anything between 250cc and 350cc should be in your comfort zone.
General rule: your weight 125lbs+passenger rider weight= cc
So keep shopping for something you think suits your style read up on it (reviews) and find yourself one with an appropriate amount of power