Here is one answer from a
non professional retail who started in 2010. The answer is therefore tainted by the bull run starting in 2009.
1. You cannot be a full time trader if you need ALL of your trading profit to put food on the table. It will not be sustainable because there will be unavoidable drawdown that puts you in a tailspin you cannot get out of. So, instead of a day job you draw on your "retained earning" when you need it, no different than folks on commissions like realtors...
2. Perhaps no more than 20-30% of investable capitals should be in trading. Depending on your own personal situation, your trading expectancy, you can calculate your own starting capital. Undercapitalization is a kiss of death for non elite retails.
3. You learned to live with drawdowns. But that is the easy part. The hard part is to keep going in spite of horrendous drawdowns.
4. I don't have an "edge", just riding this bull market.
Good luck and welcome to the club.