I’m new to this as well, I just chose this instance to switch to (also from lemm.ee) because I’m queer and knew this instance did a good job keeping out assholes.

In general I think most instances on here are leftist or at least left-leaning. The general recommendation for lemm.ee users is currently lemmy.zip, if you want a dedicated political instance I only know of the anarchist lemmy.dbzer0.com (though they are too defensive of genAI for my taste) and the European Federalist feddit.org.

This thread has more recommendations by more experienced users