Hiring first 1099

I've been doing freelance contracting for a bit over a year and my client base/workload has gotten to a level that I'm considering trying to bring in external 1099 employees to increase the number of projects I can service.

What do I need to have in place to hire a 1099 employee? Do I need to work with a CPA? What is the best way to approach contacting? How do I find good people for these roles? Do I need any special insurance? Is there value in registering as an S-corp, or is it more trouble than it's worth for a 1-3 person business?

So far my operations have been relatively "lite", managing income/expenses through QuickBooks online, and doing my myself through TurboTax. If you can recommend ways to educate myself or good resources to learn more I would really appreciate it. Thank you in advance!