I really like the number 10 lesson, which really talks about consistency and dedication, this is one of the most mistakes of newbies, they intended to stop after a few trades or don't have consistency, and keep complaining.
Because some people left trading is the reason they were able to get successful, trading is not the only way to make it in life, if some people were dedicated and continue to lose and leave it for holding or others part of life that can make them successful, there is nothing bad to leave trading then. That is why new traders are advised to use the amount of money they can afford to lose for trading, so at least if they lose, it won't be much and if they continue to lose, they can decide to continue to trade or not.
Crypto trading is very different to learn compared to the forex market where there are free trading strategies to be used immediately by newbies and then from there they can just learn how the market works. The Crypto market is different where traders learn from scratch while the project teams can be hostile to their investors as well.
You have said it, best for new traders to trade bitcoin instead of altcoins that can easily liquidate their money. Some altcoins can be manipulated also in a way if not favoring the direction of traders, it will cause money used for the trade to finally be liquidated.
I strongly buy into 4. And 8. 4 which states the best indicator that could be most reliable. Buying at support and selling at resistance is just a secure way to make good profit trading like wise 8 which advices on chasing missed trade it could be too dangerous and could also be a big market trap. Just the same way joining a moving train could cause damages so is the case trying to chase a trade. If you miss it let it go
I do not use indicator, but I can easily know the support and resistance level, like recently the support level for bitcoin is around $38000, it was around $37500 two days ago. But this does not mean the market can not go other way in an extreme volatile market, but this can help many times.