A few corrections:
... un both a personal and professional way.
I have a diplome of assistant for children and i work during summer in a youth centre, this work permits me to be more open to the others and to manage a group.
*I* work ...
I have discovered Spanish this year and i have a passion for this language, and i'm looking for a BA programme which wil give me the opportunity to improve my language skills
Moreover, I realized that the best way to master a language is to visit a country to communicate with the inhabitants, and to be confronted with their way of life, as well as their traditions and their culture.
* I would replace "inhabitants" with something like "local people".