Help upgrading to Google Analytics 4 and more

As a business owner, it’s important to stay on the cutting edge with analytics and related services. That’s why I am looking for help in upgrading from Universal Analytics to Google Analytics 4, as well as assistance with additional features such as conversion tracking. I also need help in integrating Google Ads for a more complete insight into my web traffic. This project requires experience with these particular analytics products and services, so I’m looking for a freelancer to provide quality work. If you have the necessary skills, let me know and let’s get started!

I already have Google Ads manager, but I need help making sure all the tracking and tags are correct, as well as I'd like keep track of visitors for retargeting purposes.
I am not sure what all I need to check or implement, so I am looking for guidance, explanation and help.