Flatiron: How do I remove share buttons and page descriptions from my pages?

I am editing my site (www.ashleyfrenchcreative.com) and am looking for a way to get rid of page descriptions and the share button on the pages featuring my work. I have seen similar questions on here with CSS code, but I've tried all of the code I can find and nothing has worked. For the share button, I've also tried going to the Marketing page and deselecting everything on the list...that did not work either. I do not really know anything about code, so it's possible I'm doing it wrong, or in the wrong place. But, I've tried inserting it into the "Home" page code injector and I've tried inserting it onto the individual pages...neither is working. If anyone can provide help, I would be so grateful!

@aefrench8 Add to Home > Design > Custom CSS

#project .share-like {
   display: none !important;
}

I don't see Description. Can you share a page url contain description?

@tuanphan thank you for responding! I had been putting the code in the wrong place! Your "add to" information was helpful! Do you also have the code to remove page titles? If so, can you please share. This code only removed the share button.

@aefrench8 Which pages? or All page?

All single project pages

#project h1 {
   display: none;
}

@tuanphan You are my hero! And you responded so quickly!! I have been trying to figure this out for days...and you made it so easy! Thank you!!

@tuanphan - One last question, if you don't mind! I have made the CSS updates that you sent me. Is there anyway to make the content center on the page? It is still small and justified to the right on desktop.

@aefrench8

/* This CSS applies for Desktop, if you want to tablet - desktop, change 901 to 641px */
@media screen and (min-width:901px) {
#project .gallery {
   max-width: 100%;
   margin-left: 135px;
}
}

Thank you for all of your help!

@aefrench8 You're welcome. What else do you need help with?

Reference: 18 Custom CSS for Flatiron Template