@Marapeledona, one more piece of advice.
If you reach step 6 for a certain lab and it works fine, then no problem. Otherwise, your code may stop running as expected at a certain code cell. Then before rushing to step 9 which is really going to be very time-consuming, I would recommend you to stop and think (1) whether you can bypass the error, (2) whether you really need to run the rest of the code or (3) whether you can code your own version to replace the problematic part, because getting through step 9 won’t make us learn better in machine learning but is going to cost a lot of energy without any guarantee.
If I were you, I would avoid step 9 if possible.
Cheers,
Raymond