No problem if you are not a GSuite (former Google Apps for work) customer. The most waited version of New Google Sites is available to gmail.com users. We hope that you might already have it.
Note: if you don't have see the option for it, don't worry. You should have it very soon.
Supporting Browsers of New Google Sites:
New Google Sites is currently supporting Google Chrome and Mozilla Firefox web browsers.
Follow us on Twitter for more up to dated release of Google Sites and other Google products.