is cleaning a blackstone grill a job i can do myself?

Yes, it's easy once you get the routine. Do it while it's still hot. Scrape everything into the grease trap with a flat scraper, squirt some water on the top so it steams the stuck bits loose, scrape again, wipe it with paper towels. Then a really thin layer of oil while it's warm so it doesn't rust. No soap normally, it strips the seasoning. If yours is already rusty, scrape it, scrub the rust off with steel wool or a griddle stone, then season it again - thin coats of oil, heat each one until it stops smoking, three or four times.