I am going to say another part. No theory... just practicals.
From my experience, Intraday is more returnable than investments ,as it gives huge returns in short amount of time. But its way too risky too.
Reason 1 being, as a beginner , you can only learn from your mistakes and by that time your initial investment would be long gone.
Reason 2, Intraday trading is mind game also. When we trade the market for huge money, The market will play with your emotions and discipline in return!!. If you can't handle it well,you might end up loosing all money and quit trading or worse.