Need someone to optimise Google ads grant account

I am looking for an experienced Google Ads / GA4 / Google Tag Manager specialist to review, fix and optimise an existing tracking setup.

The main priority is to get the Google Ads account running correctly and ensure the tracking structure is clean, accurate and reliable.

There is currently:

1 Google Ads account
2 separate domains/websites
Separate GTM containers for each website
GA4 properties already in place
Existing conversion/event tracking that needs to be reviewed and validated
Approximately 5 Google Ads campaigns/ads set up so far

The websites are charity/hospice websites, so accurate traffic and donation tracking is important.

I need someone to:

Audit the current Google Ads setup and identify anything preventing or limiting ad delivery
Get the existing Google Ads campaigns running correctly as the immediate priority
Review and clean up both GTM containers
Review the GA4 setup for both websites
Ensure the correct Google tags are installed through GTM without unnecessary duplicate code
Remove or replace duplicate, incorrect or outdated tags where appropriate
Check existing page-view and conversion actions in Google Ads
Review conversion goals and ensure they are configured correctly
Validate donation funnel tracking
Track key stages such as donation page visits, donation starts and completed donations
Confirm whether donation value and transaction data can be captured
Review GA4 events and key events/conversions
Ensure Google Ads and GA4 are linked correctly
Check Search Console integration where relevant
Test everything through GTM Preview / Tag Assistant and GA4 DebugView
Confirm conversions are being received correctly by Google Ads
Provide a short summary of what was changed and any outstanding issues

I do not want unnecessary tracking scripts hard-coded directly into the websites if the same setup can be properly managed through Google Tag Manager.

The final structure should be clean, easy to manage and suitable for ongoing campaign reporting.

Priority order:

Get Google Ads running correctly
Fix and validate conversion tracking
Clean and optimise GTM
Clean and optimise GA4
Verify donation funnel reporting across both websites

Please only apply if you have strong practical experience with Google Ads, GA4, GTM, conversion tracking and debugging, rather than only general digital marketing experience.

When applying, please briefly explain how you would approach the audit and how quickly you could get the Google Ads account checked and running.