Noob driver question here but i'm trying to focus on the BMW 1M S3 at the moment.
And when it oversteers i do not know what to do to manage to regain control of it, most of the time it ends badly in the wall or in the grass.
I can't find a specific question in your post... but if you're looking for general tips on correcting oversteer, it's usually a case of applying a countersteer very quickly, while doing
something with your pedals. That 'something' depends on how you got into an oversteer condition in the first place. If you're powering out of a corner and the rear steps out, you have to back the throttle off smoothly (if you lift off completely you can make it worse - be smooth and be ready to reapply throttle to maintain balance). If you're braking and turning into a corner, making the rear light and it starts to come round, you should apply some throttle. This is counter-intuitive at first because it feels like throttle would simply make the rears spin more, but a small amount will help to settle the weight transfer back to the rear to give you more grip. The pedals are all about influencing the weight transfer in these situations, which is why you have to be smooth - a severe pedal input can make things worse.
After you have 'caught' the slide, you then have to return the steering to the centre before the the tyres bite and fling you in the direction of your countersteer. This final 'recovery' phase is the most difficult to perfect, as you are fighting the steering and there is little indication of when to do it. It's better to try to return your countersteer to centre
early rather than late. If you're early you'll know, and you might be able to go back to countersteering for a moment longer (this is why you often see people sawing at the wheel during oversteer - you try to feel for when is the best time to stop), whereas if you're late, the car will snap the other way, or fishtail horribly as you try to catch the weight swinging wildly left and right - doesn't look very pretty. There is a way of applying just the right amount of throttle as you 'recover', so that you can unwind the steering in a very smooth fashion without having to force or rush it - but that depends on the car - a longer wheelbase helps for slow, easy recovery phases. The 1M has quite a short wheelbase, so nailing the elegant, slow recovery is difficult - you're better off recovering quickly.
TL;DR - Fast steering, smooth pedals.