I found EU law much easier than both land and equity/trusts, which is what we do in 2nd year, along with jurisprudence (which is still my favourite law module of all time). EU law was taught really well at my Uni, which helped immensely. It was also structured logically.
I studied EU PRE-Lisbon, and used Craig & De Burca to start with. I found that book a bit too large, and I actually preferred Weatherill, which I found had a good balance of text and useful commentary. Craig & De Burca did bits of the course really well, but in others, I found it a bit TOO black letter and not enough 'policy' or analysis.
I don't think it's hard: I just think some of the concepts are different. IE the principle of proportionality sneaks in everywhere -our lecturers spent a long time emphasising the normative foundations of the EU (i.e what the EU is there for, and what the courts see their role as), and that helped. Once you've got to grips with concepts such as subsidiarity, proportionality, the monet-schuman plan (and all the historical developments), you'll kind of see where the EU is going and why certain decisions of the ECJ seem odd.
Don't panic about it -but also don't neglect it. It won't go away, and is a very important module.