If your question is limited to the topic of receiving revenue, then it is perfectly acceptable to do business yourself as a sole proprietorship. Your state may

If your question is limited to the topic of receiving revenue, then it is perfectly acceptable to do business yourself as a sole proprietorship. Your state may require you to do a DBA (Doing Business As) registration, so you can legally operate under a name other than your own, but that's probably the only structure you need at this point. Once you get the DBA you should open a separate bank account and get a separate credit card to use solely for business. The IRS might get cross with you if you can't clearly identify and justify business revenues and expenses. Plus it will make things much easier when doing your taxes.