Dude, I feel you. Welcome from a fellow Reddit expat. Right after the Inauguration, Musk had a meeting with Spez, and they permabanned an unknown, but enormous number of people, including me, with a 12 year account, and a million Karma.
People like you and me were on Reddit when NOBODY knew who they were. We BUILT that site, made it the active conversational free speech site it was supposed to be, until they started getting heavy handed, and then went full MAGA for the second round.
You'll find Lemmy is a LOT more forgiving for political speech, although some instances and subs still have some stupid mods.
There aren't nearly as many niche forums as Reddit, which is too bad, and there isn't nearly as much engagement. You won't be getting thousands, or even hundreds of upvotes. Dozens, maybe. Often none.
On the other hand, you don't get anywhere near the amount of nonsense you have to put up with at Reddit. The other day I checked out a post that came up in a search, and had to bail because I couldn't get through the dozens and dozens of pun posts, totally irrelevant tangents, bots, novelty accounts, etc. I never did reach any actual conversation about the subject. It was so much worse than 18 months ago, and it was already bad then.
MAGA has obviously discovered the power of Reddit, and destroyed it. They haven't found Lemmy yet.
Welcome aboard!