New player. How to manage my economy and army expansion?

As the title says, I’m a fairly new player. Having played a ton of short games to get the hand of things. The things I’m most struggling with however is the expansion of my economy and army.

Maybe my expectations are a bit too high for how fast these things go, but it rly feels like I’m lacking behind with building up. By the time I’ve expanded into my second province my neighbors have a second army which i can’t always match in quality or quantity.

I played a 80 turn Tyrion game as my starter campaign and that went decent enough wasn’t rly enjoying it tough. So I switched to a warrior of chaos (Archeon) game and it’s a lot more fun, I’ve realized I always need to be on the offensive but I can’t seem to match my enemies.

Small side question, my armies feel slow and I can’t figure out why or how to fix it.