Cyraxpt: I'm thinking of grabbing Banished from Steam Weekly sale but i have some questions:
Does it have some kind of objective/endgame?
Not that I've encountered. Growing your community and keeping it alive is the main thrust, while dealing with all the new challenges that come your way.
Cyraxpt: Does it have time limit in some way?
No, but you'll find yourself responding to dangers where things can quickly go sideways.
Cyraxpt: I'm not into city building too much with microdecisions (or something like that) but i do enjoy building some stuff, gathering more resources (ex. money) and more advanced stuff.
Would this be too much difficult to someone not used to this type of games (i never played sim city or anything like that).
It's quite difficult to keep your community alive, but it's realistic and rewarding to play. You may get frustrated at building everything up only to realise you didn't prepare for Winter, for example. But ultimately it's related to games like FTL and Don't Starve, in that you will fail a lot but you'll also get better each time you play.