Hi Step, sorry you are running into issues. The best way for you to start (and what Tobias was also saying) is to first go through chapter "3.3 Demo Setup". Using the jBPM installer is the easiest way for people starting off with jBPM to get everything up and running and start getting familiar with the tooling and runtime support. Once you go through that chapter and have successfully started the demo setup (ant start.demo) you should then be able to go through the console 10 minute tutorial without issues.
As always if you run into any issues with the docs, please let us know so we can improve them.
Hope this helps.