I did manage to get Lazarus down loaded and installed. I still not sure which ver. I installed.
If you downloaded Lazarus from source-forge then the version number depends on what version directory you choose from sourceforge.
The installation says 2.2.0 and I can't find any update button inside Lazarus itself.
version 2.2.0 sounds like the version installed by your package manager unless you specifically chosen to download that specific version.
Indeed Lazarus itself does not contain a download button in order to upgrade itself. Such functionality is a typical windows-ishm that has no place in real world configurations (at least not without compromising security).
But when I start to enter Lazarus another error comes up: system .ppu not found.Check your fpc.cfg. How do I do that?!
The program still allows me to log in but warns of instability.
That indicates that either the Free Pascal compiler was not installed, the Free Pascal compiler was not configured correctly or that Lazarus was not configured correctly.
But, let's take a few steps back first as it seems you are new to this.
Does your package manager provide Free Pascal and Lazarus for you ? If so, then please use that option unless you have a specif need for a particular version of Lazarus.
In case you do actually need to have a particular version of Lazarus then consider opting to use
FPCUpDeluxe to install everything for you. Before you do so, please make sure to remove any pre-installed version of both FPC and Lazarus in order to prevent possible future issues. If you go the FPCUpdeluxe route then never use another method to install FPC and Lazarus unless you know what you are doing.
If you have any questions or issues then please ask/mention them before continuing on your own (as it seems you are struggling there).