1) to getting We say a guide to grammar, a complete guide to football, etc. The structure is a guide + noun, and "to" is a preposition. Instead of the noun we can use a gerund: a guide to understanding grammar, a guide to learning English.

Understanding the Context

2) to get The phrase can be interpreted as: a guide (on how) to learn English, a guide (on how) to get out ... In your exact context, the real underlying implication is probably more don't go too fast for your dating partner rather than ...for yourself, but that's just a quirk of the exact context. Normally, getting ahead of yourself doesn't imply being precipitate / over-hasty from the perspective of others. Which one is correct- He did not succeed to get the job though he tried his level best.

Key Insights

He did not succeed in getting the job though he tried his level best. Book says second one is correct. So, I like getting/ to get to the station in plenty of time. In grammar in use book, the bold part has been considered as correct answer. I am wondering why.

Final Thoughts

What is more, would you show me a more detailed explanation or another synonym for the following?-- I have some problem with especially using the preposition in along with plenty of time. 1) Getting messed up = refers to becoming whatever the condition is (in a bad situation) to get messed up or getting messed up=slang that means to be drunk, drugged or having some sort of problem about something. Getting messed up is something I try to avoid. [getting messed up=subject of the sentence. See being messed up below for more grammar.] Here, the verb get means become. Become is ...

I am messing up when I go to use get and being or getting or being Yes there is a difference. Trees are getting cut down refers to an action that is in progress. Someone is cutting the trees. It is the form encountered more frequently.