GTM Conversion & Google Ads Setup

My custom-built HTML/PHP site already collects leads, but none of that data is flowing back into Google Ads yet. I need the full loop closed - 15 days: • Implement Google Tag Manager tags and triggers so a successful form submission completion fires a conversion... (Budget: ₹1500 - ₹12500 INR, Jobs: Analytics, API Integration, Digital Marketing, Google Ads, Google Analytics, HTML, JavaScript, PHP)