taher making mobile games is hard, adding monetization is much more difficult. you can't just do this with tutorials, you have to know what you are doing because there's money involved.
and BEFORE you start thinking about monetization, you have to have a finished game. you can plan yes, but focus on making a game. otherwise you don't have a product.
IF you already have a game done, and are looking to monetize it, then you will have no trouble getting other people involved, like hiring someone to code the ads in.
taher it required that you have experience in Android Studio, and I do not have the best to work with.
this is a highly complex situation and you are asking for help in 3 lines of text. Excuse my skepticism.
but maybe someone else in the forums will be able to help, this isn't my area of expertise, I don't do mobile. I don't do mobile precisely because of how difficult it is made, and it is that difficult because google as a company expects professional teams to develop games, there are many walls to cross to develop a mobile app.
I mean there are entire courses and university careers dedicated to developing apps for phones, it's not for amateurs.