This question shows that you are quite ambitious in your journey. It's a great thing to be so motivated and ambitious!
Friend or Family Member
Normally I am 100% against borrowing any kind of money in order to trade or invest. Especially from a friend or family member – it can bring tension into the relationship. Even worse, the relationship could be ruined permanently...
Banks are a bit different. You really shouldn't borrow from a bank to do your trading, because you are likely dipping into your savings or money you live off of. You never want to be forced to live off your trading income – especially at the beginning.
Bank borrowing shows that you don't have the funds necessary to invest from your own money. Most brokers these days (online brokers, discount brokers) do not have large minimums if any minimums whatsoever.
You can put in $500 to get started, especially at the beginning if you don't even have a month of trading under your belt. It isn't wise to borrow money at the beginning of trading, because you are likely to make rookie mistakes...
Rookie mistakes or trading problems include fat finger error, entering the wrong trade at the wrong time, or mistyping a ticker symbol. There are many factors that come into play if you don't have much experience under your belt.
If you had a Ferrari, and your friend's 16-year-old son asked to borrow the vehicle – would you let him? Would you allow a 16-year-old to drive your expensive, exotic car with hardly any driving experience?
Probably not. Just like it's not wise to borrow an exotic car when you're 16, it's not wise to borrow capital as a new stock market trader.