Stellaris is a great realtime 4x strategy game. They have a lot of paid DLC, but you can pick and choose which modules you want. Some are purely cosmetic options while others make gameplay changes, and they go on sale pretty often. Worst comes to worst, you can usually find the DLC on key sites as well for pretty cheap. Paradox also started a subscription based service that gives you access to the DLCs, maybe you can subscribe for a month and try out which DLCs you like.

Project Zomboid is an incredibly hard resource management survival game. It is also very detailed, meaning you need to maintain everything about your character from their hydration, to their weight and fitness. Its a slow burner type game, but when the action picks up, it gets tense. Its also a "forever" game, in that theoretically, if your character never dies, the game never ends. The map is huge, big enough to feel different pretty much every time you play. Its also multiplayer, which is pretty fun.

Farming Simulator can be a fun, chill game to play. Its not as resource management intensive as a game like Project Zomboid, but it can be a good game to relax with.

Ragnarok Online is an older (2003) MMORPG that I recently discovered, and while I am not much of an MMO Enjoyer (I hate the "Disneyland" or theme park feeling most have where I have to wait in line at NPCs and bosses), Ragnarok Online's player population is consistently low enough to not feel like that while also being high enough to feel like the game is not dead. Just don't play on the official servers from the Steam client. Use a client that connects to private servers, the economy is really bad in the official servers.

King Arthur: Knights Tale is a pretty fun Strategy RPG. I haven't been able to play that much of it, but what I have been able to play was pretty fun. Check it out, it might be interesting to you if you liked Divinity and games with combat like XCOM or Fire Emblem.