Should I use SAML for my apps & users on my G-Suite website?

Question

I’m trying to configure my Website that will be intended to Promote a Senate Campaign and raising grassroots Donators funds, as well as Merch? Also I’ve paid for the Super Admin G Suite Program on Google. And I’ll be hiring a multitude of Paid & Volunteers to help with the Start up & running all aspects of a Public Servant Campaign for the 2022 midterm elections in the Democratic Party Election! I’m just now learning how to set all this up but I need help in making the right decisions pertaining to the people that are going to need to have their own email accounts that are connected to the whole of the Website I’m putting together now so it’ll be and work. Like a Professional website should work with all the bells & whistles! While maintaining it at a higher level of what a Professional Webdesigner would make it out to be? So if there are any people that is well aware of creating this type of website on G-Suites on the Google platform , I’d really like to hear some ideas and maybe some of the disadvantages of using Google to run a website of this kind of Professionalism & keeping as easy as possible for the people who’ll be visiting it and allowing them to use it without  complications  so it remains very user friendly as well Protected enough so that I nor the staff could feel safe using it as well? 
Thank you , Sincerely Paul Neese (D) building my Campaign! Website & Getting Out The Voters to come out and SAVE OUR DEMOCRACY….!