Eveyone learns at their own pace. The reason you want to focus on trying to capture only one trade per week… it will keep you out of overtrading and develop your patience and confidence in your method and most importantly… yourself.
You can start using proper risk control immediately… this is important. Only risk .5% on your trades if you are just starting. It’s not important to make money in the beginning… you want to keep your risks controled and the profits will take care of themselves.
If you are demo trading and want to develop trade selection experience, then by all means trade the setups using real world leverage you would use in live trading. As it relates to live trading from the beginning… set a realistic goal of one trade per week. If you develop quicker you can take more set ups… but start with small goals and build the base of sound trading procedures and emotionless executions.