[Theme Horse Support Team]

Hi Steven,

Its a google font. So there is no any further steps to embed it. The fonts will works only if there is an internet connection.

For you second questions, yes you can use third party gallery but we cannot guarantee that third party plugins will work fine in our theme. To disable gallery component and scripts for gallery its needs code customisation. So you need to hire a developer.

Before making any changes in the code first of all create a child theme then only customize the code. So that updating to new version all your customized code will be lost.
Thank you!