You start with your #2 pencil to lightly sketch out your image. It’s the lightest pencil of the bunch. I hope you bought a kneaded eraser, so not to rip your paper when you need to erase. Fabar pencils I found are the best pencils by far, fantastic choice!
Drawing a circle, triangle, rectangle, or square to practice your shading is something that is very valuable to learn. This is where all your pencils and graphite tones can be put to good use. Try drawing a circle first with your #2 pencil, you may need a protractor, or stencil to make a perfect circle. Sometimes I will trace around a jar lid, or perhaps a coffee cup. Then imagine where your light source is coming from, and start shading in with your darkest color first, that would be your #8 pencil. Proceed there after that with your next darker color your # 7 pencil, then continue on down with your different shades of dark to light, eventually to your pure white where the light is mostly shining on your sphere. Practice, practice practice, makes perfect. I predict in know time you’ll be drawing realism. Shading is everything, with shading my circle looks like it has form and shape, other than just flat. The deepest black is your friend, it will pop your drawing to make it really stand out. Graphite pencils are very messy, so I suggest you put another piece of clean white paper under you hand as you rest it on your drawing, you’ll be glad you did. Every drawing I do, I start from the left hand side of the paper, and as I’m drawing I move to the right, so that I won’t get to many smug marks on my drawings. If your left handed, you might want to start from the other side HA HA! Have Fun Vidas, and if you have any questions, please feel free to ask me❣️