Should I learn again the course when i finish cause i think i will not remember it?

Answer 1

You have finished the course..
Now go and practice some problems , apply the concepts you have learned to solve the problem....
Even then if you stuck then come back to revise the specific concepts....

Bcz no one can remember all things in their minds, and coding is not about learning only ,practice makes a person perfect.. As much as you grind you will get perfect day by day...

Answer 2

Follow a video tutorial and practice.