I agree with what the others are saying about let her be a kid and follow her interests.
I do think walking around on college campuses and even taking an official tour at our local college was important for my kid to get an idea of what a college was like. It wasn’t pressure for her, but just a new way to look at it. You could also take her to an event at a college close to you like a sports game or a play, etc.
Another thing I was really glad we did was a summer sleep away camp on a college campus. She did a writing camp since that is an interest of hers but they have them in pretty much all subjects and sports. I think it really helped my D22 get an idea of what life at college might be like since she stayed in the dorms and ate in the cafeteria. I would definitely highly encourage this. It was super helpful to my D22 because we never did sleep away camp and while she is really independent it just helped to have that wee bit of experience on a college campus under her belt when she started seriously thinking about things.
She also had a summer job starting the summer before senior year and that was helpful too.
Mainly I would say encourage her to explore anything you think she might be interested in as well as things she thinks she might be interested in. Sometimes kids just don’t know what all is out there so you might need to make a few suggestions to point her in a direction you think she’d really like. I would not worry too much about being well rounded, but just let her dive deep into the things she really likes.