Me mostre frases de exemplo com interested in .Me diga o maior numero de expressões diárias possíveis.

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First sentence is great. And yes, you must put pronouns after the preposition in this case.
The three main uses of this expression I can think of are:
1) Expressing a hobby or something a person likes– 'she is interested in music' = 'she likes music'
2) Expressing something someone wants to do– 'I am interested in learning more about Chinese culture' = 'I want to learn more about Chinese culture'
3) Using "not interested in" to demonstrate a lack of concern– 'The government are not interested in what the public has to say' = 'The government do not care what the public has to say'
Hope that clarifies everything, although based on your first sentence I'd say you probably already have a good grasp of it.