We tried to make the onBoarding process as easy as possible, just read the text during the wizard pages and it should get you through.
If it's not clear enough then please let us know and we will assist you through it. Ask your question in this thread so that it will also help the next person. The harvester runs on your environment and is needed to manually export metadata. You use that metadata on our SaaS solution (Workbench) to visualize your architecture. You will have 14 days of unlimited access, after that another 14 days view only. You can request a paid license for the SaaS solution. If you decide not to continue we will clean up all your data.
Follow this instruction video once you have successfully registered and gain access to the Harvester on your own environment and our Workbench. It will show you the steps to visualize your software architecture