whmcs server - is cloudways or digital ocean suitable?

I am unsure about how to select the best cloud server to get set up reselling. I currently run my multisite on cloudways, but also have a "virgin" account on Digital Ocean.

Today I setup a WHMCS account and enom account, but am unsure where I should set it all up (which server company), and what I need to get started.

Can you offer any hints?