My deepest, most honest urging to you is to NOT do what you are contemplating.
Just keep doing what you are doing for as long as you can and take the cash out and put it into stable investments for your retirement. By a nice house and car, have holidays, take care of your family. Use this to complete the task of gaining financial independence for the rest of your life. When that is well and truly done then sure, treat your business as something potentially disposable and turn it into a "company" - but even then I would not advise that.
I have done the company thing and always regretted not keeping it one-man-small and just milking all the cash out.
You are sitting on an incredibly valuable thing to you personally. Don't blow it by spending all the good cash on making a company.
The whole point of being in business is to make money for YOU. You have succeeded, you are past the finish line of my ultimate goal. Do not employ even a single person.
The fact that you are inexperienced in running a company emphasizes my point tenfold.