Other quick stuff:
Put away about 25% of your gross for taxes. You probably don't have the same expenses your dad's era did for inks, charcoals, gels, specialized paper, etc. Now, you only have software and internet connection as expenses. And cell phone use for biz.
BTW, when I teach the seminar to a ceramics class, I tell them 15% is enough, since all my potters have huge expenses for clay, throwing, booth rental, and shipping. Oy, shipping! But you, and writers...25%. Remember, even in the low bracket, they want a third of your gross. Oh, you have expenses? Okay, subtract those, and whatever is left as profit, they want a third.
But that's only until you hit ~$51K of profits. Above that, and it's much closer to half.
Also...be sure to create an office at home. It has to be an easily identifiable space, used regularly and exclusively for business. If so, whatever % of your home you've given over to your office becomes the percentage you use, so if it's 8% of the square footage, you'd get roughly 1/12th--one month's worth--
of all your home expenses, like rent or mortgage interest, insurance, real estate taxes, utilities, repairs, maintenance, and general upkeep, like light bulbs, trash bags, and cleaning supplies.
Even better, the home office can become your first and last work-stops of the day. Since going from where you wake up to where you work is the commute, and not deductible, self-employed folks with home offices can stop at the desk first, do work, then head out to the freelance gig, and write off the mileage to the gig. Similarly, when you're done, the question becomes Where are you going next? Home, or back to your desk? If the former, that's your evening commute, and not deductible. But if it's the latter, your morning commute was going down the stairs to your office, and your evening commute was walking back up, and the mileage to-and-fro is fully deductible.