Welcome Arok! I'd say the first order of business is to find out about the licensing/business arrangement with regard to Progress OpenEdge.
Progress has direct customers (those who buy it for in-house use) and indirect customers (those who run a third-party application developed by a Progress Application Partner). How this will work for you depends on whether you are direct or indirect.
A direct customer will have an account manager who can walk them through the steps required to get access to Progress' various web properties. Indirect customers don't deal directly with Progress. They purchase licenses and obtain platform and application support through the partner.
In both cases, direct and indirect, the end customer does have the ability to directly download their licensed products from the Progress electronic software download site (
https://progess.com/esd), once they are set up with a Progress ID (Progress single-sign-on credentials) and access permissions. That link takes you to a login page. There is a Register link where you can work through obtaining a Progress ID.
Once you get access to ESD, you will be able to download the product code and serial numbers for the product/platform combinations that you have licensed. Then you will be able to install the products and get hands-on with them so you can follow along with procedures you see in the
product documentation,
online knowledge base,
offline knowledge base, etc.
Good luck and feel free to come back with more questions.