Colors
Not me
A few verbs in Portuguese don’t have a form for eu. There’s no real reason for it — it’s just not there. One example of this is colorir. 
| Eu I
 | ??? | 
| Você You
 | colore o livro. color the book.
 | 
| Ele / Ela He / She
 | colore o livro. colors the book.
 | 
| Nós We
 | colorimos o livro. color the book.
 | 
| Vocês / Eles / Elas You all / They / They
 | colorem o livro. color the book.
 | 
So you can’t ever say I color in Portuguese! You’ll have to use a different form that means I’m coloring.
The sounds of R
There are two ways of saying r in Portuguese.
Double r sounds like h, as in hot.
When r is at the start of a word, it also sounds like h, as in hot.
A single r sounds like a light d, like in ready.