If you want to know more about something or someone, you can say that you are interested in them.
I am very interested in politics.
Kanako seemed genuinely interested in him and his work.
Don't use any preposition except in after interested.
If you want to do something, you can say that you are interested in doing it.
I was interested in visiting different parts of the world.
We're only interested in finding out the facts.
Don't say that you are ‘interested to do’ something.
Do not confuse interested with interesting. If someone or something is interesting, they have qualities which make you want to know more about them.
I've met some very interesting people.
There are some interesting old buildings in the village.
Don't use ‘interesting’ to describe things which make a lot of money. For example, ‘an interesting job’ is one that is enjoyable because it makes you feel interested, not one in which you earn a large salary. For a job that earns a lot of money, use well-paid.
People with university degrees usually end up with well-paid jobs.
Looking after children is not usually very well-paid.