Hi FreddyLea,
if you want to learn kana you can practice on
this site.
It's fun and you learn pretty fast.
Just start of with the 1st level. When you're able to master a level
perfectly ("perfect" is also the grade you get after you finished a level without mistakes), try to write down a whole level without looking at the possibilities. If you have wrote it down, then click on the answer and check if it's correct and move on until you complete the level.
That's how I learned most of the kana, a few characters are missing but that shouldn't bother too much.