Hi Luciana :) Welcome to italki!
You can find a language partner by clicking on 'Community' then 'Language Partners' or you can book a lesson with a teacher.
I think it is difficult to find a language partner however because many people don't answer messages or they already have a language partner - so - many people book a lesson with a teacher.
Community teachers are good for conversation practice ;they are not so expensive. You should try some short lessons with different teachers until you find people you like speaking to - this is my advice :)