Well, I can understand wanting to tackle The Hobbit and The Lord of the Rings? before going on to The Silmarillion. But are you saying that The Silmarillion is of no use when discussing Tolkien's The Hobbit and The Lord of the Rings? Absolutely not.
I just caution against making TS one's first point of introduction to Tolkien's world.
It's less accessible - and it's all posthumous.
For those who love Middle Earth, however (as I do), it is indispensible.
It is the hardest to read, and the least polished... I would never have recommended to anyone that they read it first! - We shall see how this goes!