While much of the process is the same as previous versions of Odoo, there have been some pricing changes in Odoo 11. No longer are there two free users and you pay for additional users. There is still one free application that you can install for an unlimited number of users, but as soon as you have more than one application, then you must pay $25 for each user, including the first.
In Odoo 11, the online installation documentation continues to improve and there are now options for Docker installations. In addition, Odoo 11 uses Python 3 instead of Python 2.7. This will not change the steps you take in installing Odoo but will change the specific libraries that will be installed.