After finishing the first exercise you now should know what level fits you best.
What to do next?
Here are your options:
You've reached level 3 and made no mistakes in exercise 1--> go to 'step 6'
You've reached level 3 and made less than 2 mistakes in exercise 1--> go to 'step 5' and make the exercise in level 3
You've reached level 2 and made less than 2 mistakes in exercise 1--> you may try level 3 in the 'step 5' exercise
You've reached level 2 and made more than 2 mistakes in exercise 1--> continue to 'step 5' and make the exercise in level 2 or 1
You've reached level 1 and made less than 2 mistakes in exercise 1--> you may try level 2 in the 'step 5' exercise
You've reached level 1 and made more than 2 mistakes in exercise 1--> redo the exercises from 'step 2', take a look at the vocab list from H5 or practice words using these Flashcards