I had some reference famous artist use to draw manga at youtube but i forget to save that link. He is artist manga japan well know with his detail draw manga. Try to see tutorial at youtube begginner for manga. Learn rule about manga include composition and emotion or gesture character..

If you looking for good software draw comic you can use Medibang(for tablet or laptop), photoshop(edit background, put effect,color and so on) and illustration(put dialog). Actully there are lot but you need to search.

Some tips before you practices draw manga. try to draw at least 5 page size A4. 1 page have 3-5 box scene. You can try to draw about your story life or shared some joke story. Its okay if the character doesn't look good, the most important is storyline. Take a look 2D character shin-chan!. This only look simple but what attract people to watch because the storyline. If you still lost try to read manga. Try to feel and see how mangaka create their own master piece. Don't copy their style instead try to inspired and create your own style.

Btw who your favourite artist comics Malaysia??? or any art manga foreigner..