Welcome to the forum.
nice work on the drawings, but here is a little bit of criticism: Charcoal is a hard medium to work with, I'd suggest prisma colour pencils (these are smooth, high quality, but expensive O_O).
another tip would be to use a thin later of hairspray over the page to prevent the charcoal from smearing too much.
and lastly... hello! Welcome to the forum, its really slow.