The instructions are clear and concise. However, I've repaired an iPhone 4s, 2 iPhone 6's and this iPhone SE repair has been the most difficult by far. This is mostly due to the patience involved with reattaching the Touch ID sensor. Plugging the ribbon is difficult because there less then a 30° angle to work within, but also a small shield must be slid over. This is work for a very still hand and small tools. The screen itself was more difficult too then previous experiences. Maybe it just proves that old iPhones were made sturdier.
Have a lot of patience. Take your time. Organize your screws. I used an egg carton.