Sleek Google Sites One-Pager

I need a clean, professional-looking single page on Google Sites for my BYOB event business in Varanasi. The aim is to stay completely on the free Google Sites platform—no external hosting—while still using the custom domain I’ve just bought on Hostinger/GoDaddy... (Budget: $30 - $250 USD, Jobs: Content Management System (CMS), CSS, Event Management, HTML, JavaScript, SEO, Web Design, Website Design, Website Development, Website Optimization)