I built a LFS system about 5 years ago. At least back then, the book felt a bit incomplete. While it told all the steps needed to build a system, it didn't really explain why. Download this specific version of a package, download this magic patch, and type in ./configure, make, make install. What it failed to tell is where to find those patches, how to find compatible versions of software, what alternatives do some software have etc etc.
Based on that experience I wouldn't recommend LFS. Either spend your time studying some prebuilt system (I remember one time installing Debian via chroot, which came out extremely minimal, and that was somewhat interesting), or actually design and build your own Linux-based system. Outline (maybe on paper) what parts you want (maybe you have heard of some trendy init replacement, or you just hate pulseaudio and love oss, etc). Then research what you need to run that stuff. It will take a lot more time, but it will also be much more rewarding
Based on that experience I wouldn't recommend LFS. Either spend your time studying some prebuilt system (I remember one time installing Debian via chroot, which came out extremely minimal, and that was somewhat interesting), or actually design and build your own Linux-based system. Outline (maybe on paper) what parts you want (maybe you have heard of some trendy init replacement, or you just hate pulseaudio and love oss, etc). Then research what you need to run that stuff. It will take a lot more time, but it will also be much more rewarding