No, you don't need a have a tutor to be here. You can offer to exchange help in your language.

Plenty of people want your English in exchange for Spanish, etc Javier. Sometimes who is available depends on the time of day (i.e. when it's convenient in Sth America or Spain). Maybe look up who's been searching recently, and offer a language exchange with them.

No es obligatorio. Si quieres lo haces.

Yes Javier, you need a tutor. Do refer to my profile for your best experience in learning English

Yes, a native language tutor is helpful, for conversation practice, grammar or improving one's self esteem. And if you need one,I am available.