Hey Joshua,
to hide all headings on projects, please try using this CSS:
.single-project #content h1 { display: none; }
Regarding the excerpt styling: since they are already in italics, I can show you how to make them bold and/or non-italic (be sure to remove all spaces inside the tags for them to work):
This is excerpt as usual.
This sentence will be in bold .
This will be in non-italic .
Best,
Andrii / Satori Studio