Portfolio functions

Hello,
Sorry to take advantage of your very helpful comments.
I have questions related to the portfolio template:
1. How to display the portfolio page as a home page?

My home page : https://marineetedouard-29aout2015.fr/WordPress3/
Portfolio page when I click on “Accueil” : https://marineetedouard-29aout2015.fr/WordPress3/?jetpack-portfolio-type=portfolio

2. How to limit the characters, words, or sentence size showed on the picture when passing over with the mouse?

3. I would like to display another picture when going on a selected portfolio project, and to display it on the left of the text (not above), is it possible?

Thanks a lot