If you goal is 500-600 USD/month, then 10K account is enough, as 6% month goal with moderate leverage like 1:30 or 1:50 is pretty conservative approach which should be almost stress-free which is important in my view.
Yes, it is good to become a progress learner, if in micro account getting more confidence in making a profit regularly, traders can shift up to the next level to use a standard account, each step usually will feel different psychology.
there is no fix amount really to trade full time, some do a couple of thousands, others hundred of thousands, and well some stick with just hundreds and keep a day job, a trading career will never be easy, though i do have a mid sized 4 digit account at hfm, but i do still keep a day job and trading earns me some extra, and I can not say that i made it in forex trading even after a decade of trading.
The account size needed for a retail investor to trade full time will depend on a variety of factors, including the trader's risk tolerance, trading style, and financial goals. While there is no one-size-fits-all answer, a good rule of thumb is to have enough capital to cover living expenses for at least six months to a year, in addition to trading capital. This can help traders weather any potential losses or market downturns while still being able to support themselves.
Profit in forex trading is varied, forex is a business in which a trader in the everyday market can't make the same profit in daily trading, sometimes we can make a good profit, sometimes a loss, however, we always improve trading to make a higher profit than loss.