I have lived in Sweden and Ireland for a year but I came back to my home town in the North of Spain.

The meaning of this sentence is a little unclear. Did you spend one year each in Ireland and Sweden (for a total of two years), or did you spend a total of one year between both Ireland and Sweden?

Also, I don't think that "but" is the right conjunction between the two clauses. "And" might be more appropriate, or you could simply break up the one sentence into two sentences by adding a period after "year."

Finally, I would take a look at your choice of the present perfect for "I have lived..." The present perfect doesn't make sense given the phrase "for a year." You would say, "I lived [in a certain place] for a year and came back to Spain [at a certain time]." You would only use the present perfect if you were still living in Ireland or Sweden.

Overall, great job! I'm excited to read more from you.

Hola!

Hi!
My name is Paloma, I´m learning English because I have always loved it and now I want to be a good English teacher. I would like to get the Certificate of Proficency in English as soon as possible :)

My native language is Spanish and I´m willing to teach you if you want.

I have lived in Sweden and Ireland for a year but I came back to my home town in the North of Spain. I love travelling, meeting new people, being with my friends and family, skiing... I´ve worked as a camera woman on tv for 6 years but I´m currently studying Education at university (yes, I´m one of those mature students who sit at the front of the class an ask many questions... XD )

I hope to find someone who wants to help me to improve my English and who knows... maybe we can meet sometime....

xx

Paloma

Your English is excellent, I doubt that you need much help!

Hola!

Hi!
My name is Paloma, I´m learning English because I have always loved it and now I

My name is Paloma. I'm learning English because I have always loved it, and now I

want to be a good English teacher. I would like to get the Certificate of 

want to become a good English teacher. I would like to earn my Certificate of 

Proficency in English as soon as possible :)
Proficiency in English as soon as possible.

My native language is Spanish and I´m willing to teach you if you want.
My native language is Spanish, and I'm willing to teach you if you want.

I have lived in Sweden and Ireland for a year but I came back to my 

I have lived in Sweden and Ireland for the past year, but I came back to my

home town in the North of Spain.

I love travelling, meeting new people, being with my friends and family, skiing.

I love travelling, skiing, meeting new people and being with my friends and family.

I´ve worked as a camera woman on tv for 6 years but I´m currently 

I've worked as a camera operator in TV for 6 years, but I'm currently

studing Education at University 

working towards a degree in Education.

I hope to find someone who want to help me to improve my English 

I hope to find someone who wants to help me improve my English.

and who knows... maybe we can meet sometime....

And who knows? Maybe we can meet sometime!

xx

Paloma