hey I just think if you want a cheap beginner bike, go with a used 500r. That’s what I’ve got as my first and I’m super happy to have it. spent only $1200 for my first bike! 500r line is reliable and has lasted a good long time. I’m 20 years old as well, 5’5 (on good days) and 130 lbs and its pretty comfortable. My best friend got a brand spankin new yamaha R6 and boy i was jealous. That thing is pretty! She also pimped it out: lowered, taillight thingy blinks somehow and cordinates with the super cool turn signals, and she put blue lights underneath. however, with all the money she put on that, she sure will be pissed when she drops it and breaks one of the pretty blinky lights.
if you’re worried about not looking feminine enough get a jacket that you can adjust so that the waist is tighter to show of your curves