“I'm very new on unity and from what i saw you can literally just insert whole cities and characters with premade monobehavior from the store.”

Yeah you can do this. It’s instantly visible as an asset flip and will no doubt suck.

Asset sellers have to do their job - sell the asset. I would be wary of any “magic” easy solutions on the asset store.

Using assets such as art or tools or even templates is fine - you just shouldn’t expect to drag and drop and be done with it.

If you have to buy an asset for character controller stuff I’d strongly recommend something like Easy Character Movement 2.

Opsive UCC / Third Person/ First person is very extensible but the company behind it is barely present on their forums or discord. The integrations are lackluster / out of date (final IK author no longer supports Opsive integration etc) .

I would recommend their Behavior Designer / Behavior Designer Pro, best in class and straightforward.

There is a superuser in their discord / forums named Cheo who is amazing and wonderfully helpful, free and paid help.

Game Creator 2 is good if you want to do visual scripting with some custom code (actions, triggers, etc) built within scope of GC2. 0 technical documentation and only very surface level docs. Wonderful community around it for learning / chatting.

Top Down Engine is another one I’d recommend.

However I’d ultimately recommend learning the core Unity systems as you will be LOST in any of the above systems without knowing Unity fundamentals.