Hi! I'm from Portugal and I can tell you that Portuguese is actually very similar to Spanish, although I think Portuguese sounds much more like the root language (Latin). Also, Spanish speak very very fast. My advice to you is that you should learn European Portuguese (I still don't understand why it is call "European" instead of "of Portugal", that's what I call it), because the Brazilian one has phrase constructions that don't sound very well. For instance, when you want to "join" a pronoun to a verb like "I love you", in Brazil they say "Eu te amo", but it should be "Eu amo-te" like in the european portuguese (I should also tell you that in spanish is "Yo te amo").
With the evolution of the language, some letters just dropped and became mute, like in the word "óptimo" (you don't read the "p"). Brazilians don't write like this anymore, they write "ótimo". But now, because of them
, we have to change it too. It's the new orthographic accord (Acordo Ortográfico de 1990). New... from 1990... And the maximum date to change all writings is 2016!
The whispery sound you hear is just like "ch", you write it like that ("ch") but when you say it, you drop the "t", so instead of tch is just ch. And in portuguese that sound can appear in many ways: plural "s", some middle word "s", "ch" and some cases of "x".
There are only three accents in portuguese: ´ (acute), ` (grave) and ^ (circumflex). They are used to indicate the tonic syllabi. Grave is only used in "a" to indicate a joining of words like to+the = to the, in portuguese: a+a (2nd "a" is equivalent to a "female the") = à. Acute is used in all vowels and makes them shorter. ^ is only used in â, ê and ô and makes them longer. There is also ~ that makes the vowel sound nasal: ã and õ. We also use a Ç to make ca, co and cu sound like sa, so, su (ce and ci don't need the cedilla (in portuguese "cedilha"). After all this, I'm sure you can at least read portuguese.
I've never been in Cape Verde (which in portuguese is Cabo Verde, translated would be "Green Cape") but I know that there are a lot of problems related to water because the country is essentially made of volcanic islands.
The past March (2012), I went to Poland in a Comenius Project with the theme "Asteroids". I loved it. It is really interesting hearing that language. I learned that single consonant words have meanings: "w" (sounds like "v") means "in" and "z" means "with". I don't think that Polish and Portuguese are alike. It is very beautiful to hear but a could only get this: brzcrzthfremzrc szcz żż. (sorry!)
To finnish: I always sign my name in papers for school with all Alphabets. An Alphabet, for me, means a conjunction of letters used by a language system and the first two letters being similar to Alpha and Beta. There are only three alphabets: Latin, Greek (the first one) and Cyrillic (the Russian and Serbian and so on), and they all derived from Phoenician.
Me and my aspie things: now I know all these alphabets, can read (though I have no idea of what I'm saying in Greek or Russian) and I can use them phonetically.
This is Good Bye in Portuguese (similar to the spanish "Adiós")
Adeus
Αδευς
Адэус (Or something like that)[i]