A teacher of mine from a lifetime ago once told us, "You have 999 bad drawings in you and one good one. So get the bad ones out."
Now me, personally, I would say that you need to avoid the trap of spending a lot of money. Spending money is not the same as preparing. What I recommend is going to an art supply store and buying four drawing pencils: one #4B, two #2B and one HB. And a decent pencil sharpener if you don't have one. The little plastic ones are crap, they'll just snap the lead and waste your money. Practice sharpening your pencils with the careful strokes of an XACTO knife perhaps.
Don't bother buying an eraser. When you're starting out, nothing is precious. Make your mistakes now. They're unavoidable in the beginning. Buy the pencils and a large pad of newsprint or the cheapest large pad that you can afford.
Then get the bad drawings out of you.
Don't draw from your imagination. Set up a still life full of objects in an area where you know they won't be disturbed. Then draw it, no matter how badly you think you might do. Start off light, then gradually add your details. Each mistake is a lesson to be learned. Make a new drawing from the same perspective around once a day, at most. You need time away from your subject. Each time you return, you'll find yourself noticing more or different details and your drawing skills will improve.
For light areas you can use the HB, or you could just use the 2B and blend with your fingers, but that's a bit advanced for now. Try to avoid that starting off; just use less pressure with the pencil.
Be HONEST about what you see, or THINK you see.
Start there. Save the 'how to draw' books for later, much later.