If you want to do sketching in a pencil first you buy a six B series pencil(1b,2b,3b,4b,5b,6b)each costs you five rupees and don't sharp the pencils very sharply the led has to be abit blunt and now you can try out the strokes by refering to a sketching guide book and sketch your imaginary drawing never try to copy others because other name for art is creativity.
Suppose you want to do a painting you have to use hog hair brushes(flat brushes)of different size and the colour is of your choice when it comes to water paint its nice to paint with it as you can lighten a dark colour to a very light colour but you have to handle it very carefully as it mixes with other colours.
Note:when you are drawing or painting you should never use a scale only your eyes should act as a scale. when you are drawing or painting never move the canvas hand should twist with the brush.