Awesome that you are considering making your life more sustainable. It really means a lot to me that more and more people are trying to make an effort to make our planet a little bit better. Here you can read 6 tips to start your zero waste journey.
Unless you would like to have kids in the near future, you need to consider your options for birth control which is preferable as sustainable as possible. Read here about several contraceptive methods and decide for yourself which method suits you and is as zero waste as possible.