What are the different kinds of strategy games, and what would be a good genre or game for a complete beginner?

I've been playing some Rimworld, and I love it. But I want to stop and wait for more updates to come out before I sink more hours into it.

I never played a Sim City game, but I have played some Command and Conquer and Army Men games.

I like the idea of starting primitive, getting better technology, and being able to have people/or groups of people specialized for certain things, like hunting, gathering, crafting, building, attacking, defending, etc.

I also like being able to trade with other factions.

I own:

Tropico 4

Star Wars: Empire at War

Civ 5

Company of Heroes Complete pack

X-Com Enemy Unknown

Shadowrun Returns

Toy Soldiers

Defense Grid: The Awakening

Warhammer 40k Dawn of War GOTY

Agarest: Generations of War

Gratuitous Space Battles

Multiwinia + Darwinia

Space Pirates and Zombies

Populous

and

Command and Conquer pack

Thse are in no particular order and I'm sure some aren't even strategy. I just ent to Steam, clicked Strategy, and looked for the games I had in my library.

I've started a few of these up, but never really got into them. I loved Command and Conquer Red Alert Retaliation on PS1, and got the 17 pack for like $5. I got Civ 5 because of a comment on here that made it sound super addictive, but I couldn't really understand the tutorial. Most of the other games i got in bundles or for free.

I'm not really sure where to start. I've heard amazing things about the Civ series, X-Com, and Tropico, as well as Cities: Skylines. But these look really intimidating to me, so I'd like to start small.

Any advice?