Price action trading is a type of technical analysis without any technical indicators. In price action trading, price is of most extreme significance to the trader. It is an investigation of price in connection to the past price.
I think you can create an account on the platform and then link it to your broker account if the platform supports your broker. Also, you can contact their support team if you have any broker-related questions.
Imo to avoid problem of overtrading we have to set profit goals and also let loss limits. When you have a range where your performance can fluctuate you will never overtrade. This approach worked well for me so you can give it a try too.
It is up to the individual whether to maintain both accounts or not. The main distinction between the two is that real accounts allow you to trade with actual money, whereas demo accounts only allow trading with virtual money.