Need some help editing my ZINC theme!

Hey everyone, I am new to these forums, and also somewhat new to editing CSS, and the PHP files.

So I downloaded the theme ZINC from themeforest. I have asked the author for some help, but I am not sure if he wants to answer this question ?? Maybe some of you could help! It might actually be easier then I was originally thinking.

My site is https://ApperSnapper.com

Referring to these pages:
https://appersnapper.com/ios-apps/
https://appersnapper.com/portfolio/the-incredible-apps/

There is a portfolio function in the theme with the custom CSS and all embedded nicely, however I am wanting to lengthen the individual portfolio description excerpt (text) so more text can be seen on the individual portfolio pages.

I also want to add pinterest pin buttons and other buttons on the right side of the image. The issue is that there is no visible way that I can see to edit that on the front-end? I wanted to add some call-to-action buttons like “download this app” etc. however unfortunately I don’t know what sheet to edit and how to do it. I have edited some sheets before but I’m a little unsure how to edit/do this.

Any help would be fantastic!