Yes, they all are good colleges.

Grade B pencils, sand paper and cotton - specifically for quick shade shadowing. you can learn the technique over here .

See This

how i get practice material

here are a couple of youtube videos

https://www.youtube.com/watch?v=EPBaHkj753I

https://www.youtube.com/watch?v=bxp9RQEGs-E

https://design.tutsplus.com/tutorials/technical-drawing-for-beginners-three-point-perspective--vector-23680

Balancing is not necessary, yes you can place sphere on a pyramid or vice-versa.

For more info Visit natasketches.com

For Sketching Assignments :- [email protected]

For Other Assignments:- [email protected]

Just mention your basic details while submitting the assignment:

NAME:

COURSE:

EXAM YEAR:

If you have enrolled in DQ Labs, you will get access to the DQ edge material but you have to ask for manual access for the same.

you can refer NATAsketches.com for drawing questions.