Need accommodation tips | Talk Web Hosting

I am looking for advice for accommodation.

My website is

I use InMotion shared hosting.

I have excellent results on GTMetrix, but my TTFB is about 1.5 s for 600 KB and only 18 requests.

I've disabled all the plugins and that dropped to 980ms.

I have tried everything online.

I contacted InMotion and they said "Unfortunately, there is not much to do to improve this on a shared server."

They suggested hosting VPS, but did not promise any performance improvements.

I do not know much about it. Any advice or information is greatly appreciated.

Thank you for your time.