Hi there, just found this site occasionally.
Well here it goes some help:

Find in wikipedia about: Portuguese nationality
Portugal , information about the country
Porto , info about this city
and try this site - www . sef . pt ( its about Service for Foreign and Frontiers, u can choose english version in lef side)

Well this is the city that i live, if u choose Lisbon,and some near citys, the life style is very expensive, and there is a lack of job and safety.

I advise, and i talk for my own experience, to choose Porto to start life, then u can move whatever you want, here u have all that major cities has,and plus: good food, cheap foof, cheap houses, safety, very good education (the first schools on portuguese rank are here )good health system, 2 quality certified hospitals.

I am speaking for myself, for what i see...and for what every Erasmus , and Exchange Students programs people say about their stay here.

Sunny days,
Good health system,
Cheap food and very good,
Good houses,
Portugal North better to find job since the industry are here,
Good education,

In Lisbon u will get the problems that u will find in major capital citys in Europe like london, madrid , Berlim...

You can see by the reality facts, we had, Red Bull Air race here ( 600 thousand people )Euro 2004 Soccer Cup,Wtcc sports Car FIA CUP...


I hope that i convinced u.

Any more information be my guest.

Best Regards