Mucho typos there, amigo (
), although a good reader will of course understand what you’re saying. 
However, first of al, I don’t think the OP would be an absolute beginner, because they are already running Ubuntu. But that said, any Ubuntu with the Unity desktop is bound to be an already very old one, because Ubuntu has already transitioned to GNOME proper many years ago. And for that reason, I will post my little essay here for the OP’s edification. 
With the above guidelines in mind, I will then also add that in most cases, paying attention to the forum — and especially the Announcements threads — wins more than half the battle if and when problems do occur. And the very fact that we’re seeing so many problems occurring is — indeed — the consequence of people not monitoring the forum, not reading the Announcements threads, and not using the forum’s search function, which then leads to dozens of different threads from dozens of different people that are all about the same problem.
Lastly, even though I have suffered a few hiccups with Plasma myself — and most notably, the transition from the fairly stable 5.24 to the less-than-stable 5.25 and 5.26 releases, with 5.27 returning to the reliability that 5.24 had brought along — I myself have had no real problems upgrading from Plasma 5.27 to the completely rewritten Plasma 6.0.
Yes, it still has quite a few bugs — which is to be expected from a .0.x release — but so far it is proving quite stable and — above all — fully on par with the functionality offered by its predecessor. As the matter of fact, I have found that it already offers even more functionality, with undoubtedly more to come with future updates.
