Drawing and art can be frugal, expensive or somewhere in between.
There is a huge range of price on supplies. And then there are how many supplies you want. I like color. Do I go for the set of 12 or the set of 144 or somewhere in between.
I am leaning toward a middle path but toward the frugal side.
Learning can be free online or you can get books and workshops. I see nice stuff on line but I will be trying a few inexpensive books. I generally avoid the pricey workshops.