Anyone help to create a custom page template for Customizr?

I created a custom page template a couple times before for another theme and it was fairly simple.

I thought I could do one easily here, but it is far more complex than my ability level.

My basic goal was to remove the entry-title and featurette-divider as it was crowding the top of the page. I handled this by adding the following CSS to my Child Theme

h1.entry-title, h2.entry-title, h3.entrytitle {
display: none;
}

.featurette-divider
{
display: none;
}

Works great but I mistakenly thought the blog posts would have their own template, they don’t, and I need the titles on the blogs/posts or they become a real mess.

Any input on how I would create a custom page template that would incorporate the above CSS? Then I could simply choose that page template for each page where I do not want the title to show up.

Thanks in advance for any pointers or assistance.

the site is https://www.greatoralhealth.com

Tom