I'll post here minor questions. Thanks for helping!
Levantei-me tarde e, como uns amigos me convidaram para ir dar uma volta, tive de me despachar.
I don't understand why the pronoun precedes the verb. My grammar reference says this happens in case negative words are present, in interrogative sentences with an interrogative word, in subordinate clauses, after indefinite pronouns, and after adverbs. No explanation works. However, Google confirms that "tive de me despachar" is way more common than "tive de despachar-me" (only one hit). There must be a principle...