Advice for Building a GTM Engineering Portfolio Site as a Software Engineer Pivoting to GTM

Howdy y'all! Peter here. I'm a certified software engineer with 4+ years in B2B SaaS Sales (ex-Vercel) and I'm pivoting to GTM Engineering. I'm currently building a portfolio site: gtm-engineering.blog to hone my GTME skills. Any advice on where to start or what to build would be greatly appreciated!!