@ceh-u Hello again.
The steps are pretty much as laid out in:
Which in turn links to:
which requires the first part of:
Which I’ve recently updated/clarified to help those wishing only to do the rpm testing, rather than stand up a development environment. So it now tells you when to return to the former step. In your case, as you have used a pre-installed JeOS image, you can skip the install part (staring at "Apply all upstream updates), you will also get some errors such as Apparmor not existing. You can ignore these also: it’s just not installed in a JeOS image.
These docs are meant to educate as to the reasons for each command, they are not a quick and dirty cut and paste. But this way one can know what is happening and that is ultimately more valuable and then easier to know what has not worked if something didn’t go as expected. Let us know how you get on and if it’s looking too crazy then either ask on each issue or await the installer.
Hope that helps. And if you do end up going this ‘by hand’ route then take notes on the tricky parts as those docs are being improved all the time. But they are not intended for beginners, but all the commands and config changes are fairly simple so should be fairly straightforward. But a higher than base level familiarity with linux is assumed, hence the suggestion you installed nano in our other thread on this. But there is really on one edit to do anyway so still fairly straight forward. Please be patient if you do have any issues as again it’s not intended for beginners but given your embarking on a linux course anyway it could be an interesting exercise. Just remember to be exact on any particular issue you run into and be sure to not change stuff while your question is outstanding, at least not without updating your forum question. I’m personally pretty tied up doing the next testing release (with a new twist) but there are many others on the forum who have gone through this exact same process who are hopefully going to be able to chip in.
Hope that helps. And yes this can all be done in a few lines of shell (which is mostly what it is anyway) but wheres the education in that. Plus context is everything and if an install is all that one is after then we will soon have the installer which is down to 5 actions (disk, language, keyboard, license, root password) so you might like to try that out also once it’s finished 
. We are aiming for a release ready for your hardware arriving.