You do not need a teacher to study. Open any set you can see — your own, one you took from Resources, one someone shared with you — and choose View exercises.
You get flash cards and five kinds of exercise: Fillword, Anagram, Dictation, MCQ and Matching. For an exercise you also choose what is asked and what you answer with — the word and its translation, the meaning, the transcription, and so on — so one set gives very different drills depending on the pair you pick.
Practice is unlimited and repeatable. At the end you can restart, or go straight to revising only the words you got wrong. Nothing stops you from running the same set as often as you like.
Flash cards work through the whole set with pronunciation, a flip and an interval you can set, and you can put a card aside for the rest of the run.
The one thing to know: practice is not recorded. No result is stored, nothing appears in anyone’s statistics, and a teacher — if you have one — sees none of it. Practising is for practising; the numbers only exist for tasks a teacher assigns.