It is definitely a step up from year 1 but teachers should try to ease you in with the "easier" year 2 topics. With that in mind, it does mean that towards the end, the topics get even harder and with exams also getting closer it can be quite daunting. Just make sure you revise throughout the year and if you don't understand something, don't leave it until just before exams. Also, as long as you're confident with the first year topics you'll be fine because they tend to creep back into the second year topics so a good AS understanding is key. Hope this helped!!