You can setup some site with Made for Adsense templates and run google adsense adverts with cpm ads.
Easy to say but hard to make it. You need lots of quality post and good number unique visitor before apply adsense. Usually site got rejected few times before they got approve
very difficult to get into in google adsense, you need a long time and there are some specific criteria in order to enter,
such as quality post
It is not difficult to get into google ads sense what you need is high ending domain .com or .net ,with at least 10 quality posts .
But i do n't like google ads sense since you will be suspened for no reason.
Try sites who pay in BTC instead of google ADS
Try to make an exchange (High End Exchagne)
Good luck