Ooh, that would be like saying to someone who is trying to stop smoking that they could just cut down and have one cigarette a day. They'd be back to smoking a pack a day in no time. I can eat ice cream by the tub.
As for chocolate, I've never liked high percentage chocolate very much, so it isn't appealing.
The instant stuff is very simple. Put a few frozen berries and equal quantities of cream/cream cheese/mascapone/yoghurt in any combination in a blender with a sweetener of your choice and blend. Done. Eat it immediately though, it freezes to hard to be called ice cream.
If you have strawbs, choose the small ones or cut fresh ones into smaller bits before freezing, some blenders don’t cope with the big bits.