K, I thought that might be the case. Well, if you don't know of any Slovenian phone forums where someone who is technically inclined and fluent in English as well might be able to help walk you through, you might just look through YouTube so you can see someone going through the steps as well. I understand how hard it is to do technical things when it isn't your strongest skill AND in your 2nd (or 3rd or whatever) language.
Maybe something like this might help at least point you in the right direction:
I realize it doesn't say specifically for YOUR phone, but if it has the same chipset then the instructions are usually very similar for MediaTek devices I believe.