When I have to use "TO" or "ING" to the infinitive?

I enjoy to learn a new idiom I am a native speaker portuguese. I was born and I live in Brasil. I enjoy to learn a new idiom, that's why I am studying english. I will have greate plasure speak english with different people to practice it, and to help people that want improve your conversation in portuguese.

I want learn english Well I am brazilian. I have studyed english for two years. I can read better than listen, then I would like find people that practice conversation in english with me and I can help them speak portuguese.