compatible plug-ins & button link field input

Hi,

I have few questions below:
1. Are these plug-in compatible and work with the high-end theme?

Popup Maker
Simple Subscribe
Ninja Forms
All in One Seo or WordPress SEO by Yoast
Jetpack by WordPress

I don’t want to install all these plug-in that might conflict with the theme. I want to optimize the site for seo and set up an on-click pop-up for email newsletter opt-in.

2. Also, is there a way to input a class name (assigned by Popup maker) in the Button Link field in header layout and Pre-Footer Callout to initiate a pop-up on click? Or can I only add a http url? What other elements can I link these fields to other than a url?

3. Or do you have other plug in recommendations or documents you can refer me to for functions already built into the themes for seo optimization or on-click pop up opt-in form?

Thank you!