Hi
Hey, there is no problem with being new to something. Without trying new things and pushing those boundaries it would all get very boring. We were all new to this once, or still are, so welcome to the club.
My answer would be to revert to 32bit Ubuntu.
Of course it was a good idea to try the 64bit version but it doesn't seem to work quite so well so there is no harm in reverting to what works. If you haven't yet moved your /home to its own partition then i have a neat trick for reinstalling a different version without wiping data & often without wiping programs (although the move from 64bit to 32bit will lose those 64bit programs).
There seems to be a myth that 64bit version is "of course" "better than" the 32bit version but experience has shown me that is nonsense. It's trying to apply Windows thinking to a linux-world. Don't worry about that tho, we are all learning.
How did you notice that you were still using the 32bit version? With Ubuntu about the only difference is that the 64bit version can read/write to over 3.5Gb of ram. Ubuntu rarely even needs 2Gb and i really have to struggle to get my usage up above 1Gb a lot of times. I have tried the 64bit version but it really didn't seem to work quite so well for me on my machine.
With Windows OS's you used to have to use the 64bit version to get both/all cores of your machine working but linux had this ability from very much earlier as it was based on Unix which was designed to be a multi-everything system. So Ubuntu 32bit uses all the cores of dual/quad core and multiple cpu chips on the same mbord.
There really doesn't seem to be a very convincing argument for moving to 64bit as far as i can see. Everyone is entitled to their own opinions though
Good luck and regards from
Tom