Buy what you like
There is much advice. I've been riding for over 30 years and here are a couple things I think are important.
1) If you've never ridden. Take one of the motorcycle safety courses. Every state offers them and the knowledge the instructors share is excellent. Most of the safety courses have a few sessions that are women only so if you feel uncomfortable with the men around register for a female only class.
2) I think you should buy what you are comfortable with and like. I see and hear about too many women who have allowed the male in their life to decide what motorcycle to purchase. Sometimes they like it, but more often they don't. Don't be afraid to sit on them and if possible test ride one.
3) Don't ride initially with anyone who pushes you past your comfort level. With experience you will start expanding your comfort level on your own.
4) Remember the adage "If you think you can you can, if you think you can't, you can't". Mental attitude goes a long way.
I love riding and had very supportive men who got me started and didn't care that I was a girl. I determine what bike and accessories I want and don't hesitate to tell the salesman when he isn't listening to me. I speak up and buy what I want. If the group is riding in a manner I'm not comfortable with I don't ride with them.