it'd be nice if you could share a few tips on how to be assertive and opinionated? (in the sense that one is independent and critical in thinking. Most people your age either dont give a shit about 'issues' or are simply too reluctant to use their brain to read, let alone to think.)
I am in no place to share any tips as I myself am struggling with that, too. The fundamental rule is in your question tho. Don't be too reluctant to use your brain to read or think.