One of the best resources available to freelancers is the Graphic Artists Guild, which publishes The Handbook for Pricing and Ethical Guidelines.
You don't have to be a member to take advantage of their many resources, but members get support from other freelancers and experts.
Joining an organization like your local Chamber of Commerce or The Creative Collective can help you learn from more experienced freelancers and creative business owners.
Use this worksheet to understand your expenses and income and create a predictable personal budget.
Understand what you can deduct on your taxes for your creative biz.
It is tough to get an agent! However, getting an agent is often necessary if you'd like to be traditionally published.
The QUICKEST way to get an agent is to go to conferences where you can meet agents in person, get portfolio reviews, and network.
For more information, check out some resources here. There are many more available if you search online, from podcasts to YouTube channels.
For writer/illustrators and graphic novelists:
For illustrators: