There is a good likelihood that whoever comes after him will be a lot more competent.
CoughVanceCough. He is bright & very smart, powerful, and young. His Munich speech for example, even though too many of my EU fellow citizens (and representatives as well) dismissed it as non-sense and mean, was quite articulated (very hypocritical too, but that’s not the point) and, well, quite informative on what the USA want to do and what the USA will do.
And so is Bessent, in a less rhetorician way even though I don’t imagine him becoming a leader but that’s just my gut feeling ;)
You don’t.
You don’t find people online (or IRL) waiting for strangers to start a discussion on some random topic you feel like talking about. Because people, unlike trolls, are busy with their live.
What you can find is people willing to discuss with someone they find interesting or, with any luck, intriguing on whatever topic you both are interested in.
So, what are you interested in? Have you any hobbies, interests, passions? Find small communities around those topics you’re interested in, and start posting. Do the work to show you’re there and that, maybe, you’re worth discussing with.