From your 2mhost admin area, choose your hosting account then

1. Switch to 'Website and publishing' tab.
2. click on 'Launch siteSPARK website builder'.

siteSPARK available for  the main domain of all hosting accounts. siteSPARK is not available for addon domains and subdomains.

If you launch the builder for the first time, you will be forwarded to the sites browser, where you can preview and choose a starting point for your website.

Otherwise, you will be forwarded to the Site Editor