Which one is better:1.practicing after each lesson. 2.practicing after compeleting a course?

Answer 1

As while going through the course it would often be easy to forget certain things, practicing after every few lessons or so (it doesn't have to be after every lesson) would be very helpful in learning that specific language.

Answer 2

Play with the "Try it yourself" as much as possible, if some question come to your mind like "what happens if I ommit this or that, change it a bit" etc.

Answer 3

practising after each lesson is better to avoid confusion among the lessons

Answer 4

practicing after each lesson is better