I gave it a try, its fun to use.
You can draw pretty cards, for example invitations, inspirational cards or cards for easter or christmas ...
used to draw some by hand, but you have to be careful, if you slip up it shows.
If you draw them by computer all of them look pretty and the same

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There are tutorials out there, and there is a help function...
if you use gimp it shouldn't be too difficult... otherwise well it might take a few moments to get used to

maybe there are even a few vids on youtube, explaining a few things...
wish you fun