Hi WeWalk hope you are well!
The above link has many free tutorials. If I were in your position I would complete two of the tutorials/courses typing in the code by hand absolutely no cutting and pasting. I would especially choose a course that has a web part where you deploy an app online.
Once I have competed the above I would create my own app and deploy it using GitHub and Docker.
When all the above was complete I would start the fastai course.
Jeremy recommends typing all the notebooks by hand when you start and checking how much you can remember especially the main stages.
One of the many people who inspire me on this site is the person who wrote this post. How do you... learn? (and study) - #6 by Brainkite
His output is prolific.
If you do most of the above I am sure you will find the whole course/journey inspiring.
Cheers mrfabulous1 