If you’re asking about breaking into the RTS genre, I think that Northgard might be a great intro. That quote does a good job summing it up. I’m pretty terrible at traditional RTS games (Age of Empires, Starcraft etc), however I loved Northgard and it’s a very different experience.
It’s much slower-paced and the design is clean and tight. You start with a few villagers and the strategy at first is just managing your consumption and production of food and wood. Later, you’re never juggling more than a couple dozen Vikings, and the tile based system feels almost like a board game. The campaign is also a decently paced introduction to all the mechanics without feeling too hand holdy or easy.
The skirmish modes are more challenging and free form, since you’re not being sent down a specific victory path but are setting your own goals. I haven’t sunk a lot of time in this mode but it feels pretty rich so I’ve been meaning to go back to it.
If you like Northgard, it might be a strange leap, but I think Company of Heroes could be a good next game. It’s also a bit slower paced than Starcraft (personally I just use “tactical pause” when playing CoH) but shares some mechanics with Northgard (sort of tile based area control). Obviously it’s a very different theme (WW2) so has a different vibe.
Rock Paper Shotgun did a very thin “intro to RTS” post last fall, which has both of these on it but also a bunch of other options, which could be helpful for comparison.