To “achieve the opposite”: give up on your agenda for their relationship with drawing, or whatever interest of theirs you want to promote.
Support it when requested, but give support only when requested.
Think of your child as being driven by their enthusiasm and interest. They don’t control these forces and you do t either. Trying to force them kills them. Trying to direct them suffocates them.
So, be there, celebrate what they celebrate, lend an year to their doubts, feel free to offer a bit of support but never insist on it. Watch it grow and maintain the soil; that’s all you can really do.
Compliments are also rewards by the way ;)
I highly recommend taking a look at the book, it’s in most libraries.