Plugin Recommendations

Hi,
I just signed up and downloaded the Dashboard Plugin. The amount of information is a little overwhelming, as I do not have a lot of experience with this. Right now I need a secure Registration Plugin; I am having trouble with getting Beaver Builder Plugin (Lite Version), Black Studio TinyMCE Widget, Page Builder by SiteOrigin, (Spacer -- not working, so I looked up some shortcodes online); getting fonts and spacing to work the way I want them. I know this is a lot to ask about -- these plugins were recommended by Tyler Moore on a youtube video. So I'm asking for the best secure Registration template; the best Pay plugin; and the best security plugin. I guess that's it for right now. Oh, I also need a good backend database plugin that is very secure; and a mass email plugin to email my subscribers.
Thanks for your help!
-Pam