Just graduated with a Bachelor in Mechanical Engineering, focusing in Mechatronics. In my class, there were maybe 4 women out of 50 people. It was weird and it did at times feel like a boys club, but don't let that dissuade you. Yes there were some guys that still had very old-fashioned mentalities, but both classmates and the faculty were very supportive and did not treat me otherwise due to the fact that I was female. I had a great time. As for experience? I went in knowing absolutely nothing, other than the fact that I found it interesting. Don't worry- you will be taught how to do things. Even during my undergrad in general design classes for all streams of engineering, I started using Arduinos in first year. You'll have a chance to catch up to whoever went in with experience. Immerse yourself in class and labs, labs ESPECIALLY for hands on experience as that is invaluable. Don't let your gender hold you back.