You're substantially undercharging. You're not teaching basketweaving. This is either a business or professional growth expense. You'll find that many products with shorter consumption timelines than 4 weeks (that is going to be problematic, by the way) cost closer to $500 than to $150.

As one creator to another, you do not want to teach programming to people who think $500 is a lot of money, because they will almost universally also say that syntax is a lot of hassle, hours of work is a lot of time, and your planned level of customer support is not the level of handholding that they expect for paying OVER. ONE. HUNDRED. DOLLARS.