Have I used commas correctly?

Sarah wanted to visit her grandma, even though she had already seen her the day before and also managed to bake herself a fresh cream cake.


The land lord cannot throw me out. Unless he has valid reasons to do so and therefore I shall live in my home.


The hopeless old man walked by the canal glaring in to the deep blue water, which reminded him of his childhood where he experienced the most wonderful events.
Note always after the comma and full stop spcae for one letter.
the letter after the full stop is capital.