Do you get confused when “There” or “It” are used as the subjects of a sentence? In my experience, many native Spanish speakers have a difficult time with the haber -> there + to be structure. If you do, check out this great little lesson from the British Council: It and There. They have a short, 10 question, exercise at the end of the lesson.
If you’d like to practice the impersonal it & there a bit more, the University of Victoria has two short exercises for you to try:
Exercise 1: Multiple choice
Exercise 2: Fill in the blanks
Best of luck!