After you develop your set of rules to trade, best to demo it starting with $2500, when you triple it, start again with $2500, do this 3 times and then you be ready to real time trade, otherwise you will run out of money.
Have a check list of your rules, and you can only do what is on checklist, cause anything outside the checklist is failure.
The ES, unless you are very good at trading, is not an instrument to day trade all day long. There is a reason my house only trades first 40 minutes and last 2 hours of the day. Many traders have problems of identifing chop after it is too late and have a few losses. The afternoon session is very much CONTROLLED, and unless you have the wisdom of watching 10,000 hours of screen time, you will be a victim much more than being profitable.
And the last 45 minutes of day session is only time of day where my backtesting shows when the DOME shows value on volume, but unless you watch for months, only then can one understand the value. Using support/resistance and Dome can give from 1-4pts in this time.
I use to trade all day long when I was a newbie and wouldn't listen to the old timers on trading less. If you can get your losing percentages extremely low, you can average down on all trades, then breakeven trades you end up making very good money, so between breakeven trades and winning trades, you can actually be cleaning up on 90% of your trades. Only trading during times that have best chances for trends reduces commissions and stress.
And Have a goal in morning, like 2-4pts, get real good at this amount and then add size, after goal is reached, reduce contract size 80% rest of the day so you make it almost impossible of having losing day.