Hi Melu,
Congratulations on taking your first step into a bigger world...
Anyway, You need a program called Gecko OS, which you can find on the Wiibrew wiki. The download should contain three files: boot.dol, icon.png, and meta.xml. Only boot.dol is necessary, but the others give it a pretty icon for the HBC and labelling (i.e. text info for the HBC). Take these files and put them in SDCard:/apps/Gecko OS/, and you should be good to go.
Gecko OS allows launching of region-free discs, and according to your region you can change the settings. Since you're in a PAL region, change the video mode to "Force PAL50" or "Force PAL 60" and then launch disc. The default settings may also work.
This is a GC game, so the following does not apply, but you should know all the same: installing an update from an out of region Wii disc will brick your Wii because the system menu will be incorrect. The current version of Gecko OS automatically prevents this from happening and just installs any critical components for you (called IOS - you should read up on this term on the wiki too).
My mum uses this every day of her life, so you shouldn't have any trouble.
Enjoy.