Need Drawing Advice

So , I really need to draw my ideas out ... have done it on paper with pencil as sketches..I definitely improved but it is not a representeble work or the mental image I have. So Should I continue redrawing and making them better on paper again and again until I get satisfied? I was wondering if Digital Drawing is better than physical or not , tried it and damn it's harder . How you guys make arts of your world ? Digitally? Physical sketches? Which one is better for me to learn first that helps me progress better ?