Keyboard character problems

Hi folks,
I have recently bought a 13" Mac Pro in Chile while travelling. The keyboard layout is different to anything that I have used before. It appears to be a Spanish keyboard layout.
My problem is figuring out how to find the correct characters that I need.
I am a basic user and am used to an old fashioned keyboard with 2 characters on the key and simply using Shift to identify them. The new one has 3 characters on some keys and 2 on others.
A number of keys that I need to use just show something different to what is actually written on the key.
For instance, if I hold shift and hit the Question Mark key, I get a straight line.
None of the keys on the RHS of the keyboard seem to show what it says on them.
I am totally confused.
My OS is Sierra 10.12.2. I have tried changing the keyboard layout to other versions AUS, US etc and it changes but still makes no sense in relation to what is on the key.
Any help or suggestions are much appreciated.
BR,
Dave.

 

Hi SnackTime,
Thanks for your help. I solved the problem eventually.
Apparently there are 2 Spanish keyboards ( go figure ).
Spanish and Spanish ISO. I wasn´t seeing the ISO version listed though in Keyboard preferences.
I must have done something differently and it appeared.
So, that was the problem and it is now working fine.
Thanks again.