IWTL how to think critically and form my own opinions

Edit: Thank you everyone for your in-depth and thoughtful responses. You went above and beyond to provide me with many great recommendations and a lot of insight. I appreciate it!

Growing up, I always had people around me that held very strong and sometimes controversial opinions. I feel like that has had a negative impact on my (24F) ability to form my own opinions in my adult life. I feel I depend too much on others’ opinions to create my own, instead of using facts and inner beliefs. I find myself feeling neutral about too many topics or worse, not really being able to reason why I might have a specific opinion. You can say I’d lose every single debate ever!! What baby steps can I take towards finding my own opinions and understanding why?