I note that a son of my congregation is still a pastor by the grace of God. Under the old covenant, Leviticus 21 would forbid him of continuing as a priest due to the breaking of his arm about 3 years ago (healed nicely through the wonders of surgery. But it certainly was mutilated for a time.)
Also, though it may seem there is a bunch of Law in this book, don't miss the Gospel. This book is about God's desire to relate to His people, and how sin must be dealt with for that to happen. Also, note the grace in Leviticus 21:8, 15, and 23 - people do not sanctify themselves. The LORD sanctifies you and His priests.