is there any document to setup cloudron
@homo have you seen https://cloudron.io/documentation/installation/ ?
what the best company to get server to install
this very much depends on your preferences. We have had great experience with all the ones listed at https://cloudron.io/get.html
@homo for the easiest experience, i would sign up at https://www.digitalocean.com/ . Cloudron is available as a 1-click image in the marketplace. So, you don't have to install it at all.