I'm 17. How does my plan to become a millionaire within my 20's sound?

My first step would be convincing every single family member(distant family member and all) to sign over all their possessions to me, that way I can take out a $1million dollar secured loan over 10 years for basically no interest.>>Secured loan
Of course they will be rewarded in the future with some amount of money for their risk.

My next step would be using that $1million dollars to either:

a: Use that money to give out loans myself, but with a rather high interest rate, and make money back like that over those 10 years.

or

b: Use that $1million dollars to play around with the stock market for those 10 years and hopefully make a million dollars in that space of time. Through research I have heard that with $1miilion you can make a passive income of $100,000 a year with the stock market, if everything goes right of course. And I think it is common sense in some scenarios that let's just say Apple is making a new iPhone, you are bound to make profit from increased sales. I will think thoroughly before I invest into stuff

Keep in mind that of course I'll still be working and attending college during that time. I will not be living off that money I'm making with both methods. So, thoughts? Also, which method is better?

Your family won't do that and you need.to be trained to be successful in the stock market. You could hire a broker but they are really expensive. If you can get enough money put it into an investment company with high risk.

Your first step fails. No one is going to sign over possessions to you unless you can absolutely guarantee a payback commensurate with risk - say a guaranteed 10% annually. And you are not getting a secured loan at basically no interest so that is out… You are looking at interest of 6 - 10% annually.

Next, your loans idea is almost a non-starter - you need to be licensed and bonded to provide loans along with a reserve. Also, all states have usury laws which prohibit insanely high interest rates. And of course you have to factor in defaults (why would anyone which decent credit go to you for a high interest loan when they can go to their own bank for a loan with market-rate interest)?

Then there's the stock idea - average returns over time are 8% annually. Even if you hit your 10% goal, over time, returns will return to the mean.

Extremely stupid.

Sounds great, but in the meantime you should practice this line that will help you in the future: "Sir, can I take your order?".