How to fix my Soufflé?

I tried setting egg as the theme with which I'll start to learn cooking. A Soufflé was what came to mind (I'm capable enough to make omelettes to give you an idea of my skill level.)

Here's what I did: •I separated the whites from the yolk (2 eggs) •Added black pepper and a pinch of salt to the yolk and whisked till I got a proper consistency •I whisked the whites till I got some foam, them added some sugar and kept whisking

Now here's where I started to get problems. I whisked for about 30 minutes but I didn't manage to get a thick consistency no matter what I did. I kept telling myself I need to be patient but I'm sure it's not supposed to take more than half an hour.

I still mixed in the yolks and the whites after this (the whites were suuuper foamy but still runny and not a solid white colour) and added them to a pan on low heat with butter and covered it with a lid. I waited for 4 minutes and the egg looked like a deformed omelette.

I'm not afraid of failure and I'll keep trying till I perfect it. Any advice is appreciated! I'll post updates.