My dream is to speak english.

I'm interested in languages, technology and travel. I like to spend my free time with my wife and my daughter. I'm really/very (1) interested in english because I want a better life to for my family and I want a development work job (2). Actually/Currently I'm studying in the Universidad Politecnica del Valle de Mexico (3).

Very well done!  Your english is clear and you communicate well!

(1) really/very - either word can be used but 'very interested' is more professional sounding.

(2) You have the choice of saying 'I want a development job', or 'I want development work', but not 'I want a development work'. 

(3) Actually/Currently - either word works, but 'currently' is the better choice and it allows the sentence to remain the same.  If you do want to use 'actually' then it would sound better to add what you're studying for, as an example 'Actually I'm studying in the University for a Degree in Development Work'.  

(3) In English, titles are capitalized, so the university politecnica del valle de mexico becomes University Politecnica del Valle de Mexico.