Prepositions sentences - First part

I'm trying to understand when I have to use each of this prepositions. In Spanish we only have one, but in English it's hard to learn when I have to use each one.

It would be incredibly difficult to take each preposition in English and attempt to explain all the possible uses of each one.  That is because each preposition has multiple uses.  However, what I can try to do is to tell you why the particular prepositions were used in your sample sentences.

I arrived at home at 5 o'clock.   [When telling an exact time, use "at".]

We saw each other at midnight. [same]

I dressed up on Tuesday night.   [When specifying the day of the week that something occurred, use "on"]

We met him in the morning.    [When stating what part of the day something occurred, we usually use "in" (sometimes we can use "during")]

It was in October last time I saw her.  [When stating the month that something occurred, we usually use "in" (sometimes we can use "during.")

I'll go to the bed in a few minutes.  ["go to bed" is fixed phrase (ir a dormir)

In four weeks I'll be on holiday.   [To state how much time in the future something will happen, use "in"]

I lived in Granada for three years.  [To state the duration of an occurrence, use "for"]

Prepositions sentences - First part

I'm trying to understand when I have to use which prepositions. In Spanish we only have one, but in English it's hard to learn when I have to use each one.

For example:
I arrived at home at 5 o'clock.
We saw each other at midnight.
I dressed up on Tuesday night.
We met him in the morning.
It was in October last time I saw her.
I'll go to the bed in a few minutes.
In four weeks I'll be on holiday.
I lived in Granada for three years.

You have a understanding so far!