LOTR books are awesome, same as the movies. Definitely recommend. The movies have the biggest 'epic' feel to any movie series out there. So so good.
Silmarillion is written very, very differently than Lord of the Rings and The Hobbit (which are both also written very differently to each other with Hobbit being aimed at children) and is known for being an extremely tough read even amongst Tolkien fans.
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”