See if you can access ‘System Preferences’ and then go to Keyboard & Mouse. Make sure "Tap trackpad using two fingers for secondary click" is checked. Then you hopefully afterwards you can just right click using two fingers on the trackpad.
Other things that may be relevant are that on some Laptops (I don’t know about Macs) there may be another key to the right of the ALT and Space key with a little mouse pointer icon on it, if so this would be a RIGHT click key.
You could also try highlighting the thing you want to select and see if pressing ALT + Enter gives you a Right Click Menu, You could also try using Shift + F10 to do the same.
Also have a close look at your trackpad to see if there is a small square in the Top Right corner, or try tapping in this part of the trackpad to get a Right Click.
Hopefully one of the above will work for you.




