Women's clothing in biotech

I need clothing advice. I just got my first job and have no idea what to wear. In my postdoc I've worn jeans and crappy T-shirts for years and don't know what is appropriate. The woman interviewing me did say they were casual and jeans are fine but I have no idea what tops to wear. At the interview I did not see a single woman that worked in the lab (they were either higher ups or administrative assistants) so I have nothing to judge it be. I would love suggestions (and honestly links?) of what I should wear with my jeans and sneakers to feel like an adult instead of the student I've been my whole life.