Canada: https://www.reddit.com/r/PersonalFinanceCanada/

Germany:

https://www.reddit.com/r/finanzen/

Europe in general https://reddit.com/r/eupersonalfinance/

Or if your goal is retiring early: https://www.reddit.com/r/EuropeFIRE/

Seems like a more familiar community to me.

For Italy: https://www.reddit.com/r/ItaliaPersonalFinance/ (No idea how good it is, a friend says https://www.finanzaonline.com/forum/index.php is better)

For France: https://www.reddit.com/r/vosfinances/

I wish I had known about r/vosfinances sooner. As an American I tried to approach my finances from that perspective and encountered lots of roadblocks. Something like ETrade didn’t exist. My bank wanted to handle my money for me and pushing too hard for me to hire their investment team. It was way less friction to open a investment account back int the US and wire money to it. No pushy up sell

Won't you have difficulties in general with all money-related things in Europe as an US American? I've heard stories of banks refusing to create an account for you because it's too much bureacracy... What solution did you eventually find?

Never had a problem with opening accounts. But I also use banks with a big international presence.

For The Netherlands: https://www.reddit.com/r/geldzaken

Not exactly personal finance, but https://old.reddit.com/r/IndiaInvestments/ can be considered as the Indian equivalent of that.