S Corp or LLC?

Depending on how young you are, you may be able to get away with not incorporating at all until you start making real money. You could technically get into trouble, I suppose, but it's so unlikely. If your dad is well-off enough to have an attorney, he's also well-off enough to help you respond to some scary letters.

Frankly, I would just forget about all this for the next year or so and first see if you can get any paying customers. There's a good chance your business will never take off, so by going stealth you're avoiding a lot of heartache. This isn't legal advice, obviously.

You're young. Get a DBA and business insurance. Once your profits exceed $20k, then focus on an LLC or s corp.

Your business may never exceed $10k and while that seems like a lot of money to you, it isn't when compared to the filing, tax and legal complications of earning that $10k.

You should speak with a business attorney. I can only tell you what I would have told myself. If you have parents, ask them what they want to do. They may want to go into business with you.

I am NOT sure about a LLc however my company is an S Corp. At the end of the day your business makes a profit, that money is also YOUR profit when you file taxes. As a S corp you will be able to find MANY more ways to write off profits and pay less taxes.

Because I incorporated as an LLC, I am now in US Tax Court and have had my wages from my teaching job outside of my startup garnished. The IRS claims I personally I owe over $200,000 in back taxes. When I ran out of runway two years ago, I went into cockroach mode & laid everyone off. The company that had not broken even until the day I laid everyone off. I have been running the whole company myself since then (without pay) just to attempt to use the meager revenue to pay off debts that are falling on me personally. I did not have any money left at the end and could not hire an accountant. It took me a year to go back and file all of the back tax returns. The IRS denied all of my business expenses some unknown reason and put me personally on the hook so now I'm learning how to defend myself in US Tax Court. The problems don't end on the federal level, they trickle down to state and local in NYC. NY State took all of the money out of my bank account for withholding taxes for the CTO I laid off two years ago. Then, they levied it again for a balance due on sales taxes, that turned out not to be due; we just had not filed a form.