Conversion Tracking setup in GA4 - 3 websites

I am looking to have some Conversion Tracking setup in Google Analytics 4 across three of my website assets. To begin with, I need to setup some Standard Tracking. I do already have a Google Analytics account available, so this can be built onto that.

I need track form submissions in GA4. Please help with that.

I am looking to get this setup advertised and worked on relatively soon - any help would be much appreciated.