I'm a big nerd and I've read a lot of books of all different kinds, and I'm an English teacher.
Tell me what you like or what you're looking for and I'll recommend something I think is good
Also, fun history fact, this comm used to be called c/books until I started posting poetry on main every day in protest of there not being a literature comm. Direct action gets the goods comrades
Excellent vibe
Pale Fire by Nabokov
Whores for Gloria by William T. Vollmann
House of Leaves by Mark Danielewski
Only Revolutions also by Danielewski (I'll be honest, I didn't like this one, but it's very much in the vein of what you're talking about)
If one winter's night a traveller by Italo Calvino
Infinite Jest by David Foster Wallace if you want a project
Tristam Shandy by Lawrence Stern if you want a classic
The Posthumous Memoirs of Bras Cubas by Machado de Assis
Hell Don Quixote has a ton of metafiction, and it's arguably the first novel!
House of Leaves is the one I had in mind when writing that so you nailed it. I think the family's actually got copies of some of these so I'll check em out!
I'll also say that John Barthes is very associated with metafiction, but I haven't read much of his stuff
John Barth (I can see why you went with Barthes for his last name though :P )
Pale Fire
Whores for Gloria
House of Leaves
Only Revolutions
If on a Winter's Night a Traveller
Infinite Jest
Tristam Shandy
The Posthumous Memoirs of Bras Cubas
Don Quixote