EatNoise

I run a music-based website (eatnoise.com) which was built ~ 7 years ago. It was built using the jQuery framework, using PHP and MySQL in the backend. The site wasn't successful business-wise, so the site is more or less dormant.
Now, I am learning web development myself via structured, online tutorials from Udemy. After working as a band-booker for several years, I want to pivot the site to include band-booking and ticketing features.
I have two options: Engage the web developers who built the site initially and pay them to make the upgrades, even though there are improved technologies that have come onto the market since to increase performance, security, and SEO, OR build the site myself to my specifications using technology clearly on the ascendant. The first option means I get to market much quicker, albeit the technology will be redundant sooner and comes at a performance cost. The second option means it could be a year before I am proficient enough at coding to build the product myself and would take months to build, but I have the latest in technology to make a good PWA, but I'd be able to debug and make changes to the site myself.
I'm looking for the advice of experienced developers who might be able to suggest the best way forward.