Yep! The Silmarillion is reads like a dictionary, it was never really meant for wide publication. That was meant just to give an extremely broad overview of things in the world. Basically the Silmarillion is just a selection of Tolkien’s original notes that he used to put the other stories together.
Go for the original Hobbit and LOTR books first, they are the actual grand story epic that made the world so popular.
If you want a great version of that, There is a leatherbound tome that contains all three Lord of the Rings books in it, commonly referred to as “The Red Book of Westmarch” (that’s a reference to the name of the book that Bilbo wrote to chronical his adventures, which he then gave to Frodo, and eventually passed on to Sam to finish)
This was the last printing that I feel really deserves that name. It’s like some sort of giant wizards tome. It is the first version I read as a kid. and it’s flipping huge.
This is the version printed in the 1980’s and it is very high quality compared to the modern reprint. But because it is so old now, it’s very difficult to find this version new. It was what I read personally when I was very young, my parents had a copy of this version that had been read so many times it was falling apart, but was a great book for young me.
When I got older, I worked in a bookstore for a while and happened across this same book still brand new in it’s original wrapping, I bought it and that sits on my shelf to this day, unopened from it’s original plastic cover. Someday i’ll pass it on to a passionate reader to enjoy.
https://www.amazon.com/LORD-RINGS-Fellowship-Towers-Collectors/dp/B00M0NFYTC/
There is a modern re-make of that version, but there was substandard quality control, and several people received copies with issues, which drives the ratings down. If you can get a good copy though, people seem to like it quite a bit.
https://www.amazon.com/Lord-Rings-Special-J-R-R-Tolkien/dp/0063274736/
If I were giving this as a gift to a Tolkien lover, those are the versions I would look for. If you want a copy that is more traditional in size, this is the one I would get for people who had not read the stories yet and would want something easier to read.
https://www.amazon.com/Hobbit-Lord-Rings-Boxed-Set/dp/0008376107/