creating a small group online registry and info page

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I am trying to build an online group register for our small groups and am not able to figure out how to do it. I purchased the Registrant group 1-0 add on but am still not able to figure it out. Here are some examples of what I am trying to build:

http://www.mynewwalk.com/small_groups.php...

https://timblkwa.infellowship.com/GroupSearch...

I’m using the enlightened church website them but will be purchasing and changing to the Mosaic them shortly
Any ideas of how to get this done, or any suggestions of other add-ons that would help me build this, a step by step instruction would be great.
Sonia