Film and TV are very competitive, and you can find yourself working long hours under difficult conditions. That said, it can also be very rewarding and a ton of fun. If it's something you love, then you should not let the difficulties deter you. There are always plenty of entry level jobs on shows as a production assistant, so you can see if you enjoy the art and science of making movies during school, and then go work on a big set during the summers or breaks to see how you like the business. A film degree can lead to movies, TV, advertising, digital, writing, and more - so really explore the various gigs as much as you can. It may take a while to find the best fit for you.
As for being a woman, never let others stop you from achieving your goals. I've worked with and for many women in the industry, and while they did have to work hard, they've made great movies and shows and enjoyed doing it. Unless your parents are famous or powerful, everyone starts at the bottom, and the hardest workers are the ones that stand out and move up.