We had them at school. Long time ago. We did it in about a minute as I recall.
I got it wrong - I was quite a bit older than school days. My apologies.
When they first came out, my brother and I were fascinated and we tried for weeks to do it
One day I sneakily peeled off the coloured stickers and rearranged them so it looked like I’d cracked it, and told him I’d solved it because I was so much more intelligent than him
The trick to the rubic cube is to get 4 colours in the left hand corner. With those facing you turn the right hand side once upwards then the top to the right. repeat and keep repeating and you should get all the same colours together if you do it enough times