If all you have used so far is Ubuntu, then what you have learned is "how Ubuntu works", not necessarily how a Linux system in general works.
As another commenter pointed out, given the zero cost (other than your time) nature of trying something out, why ponder? If your pondering is that you don't want to mess up your current system, then install Virtual Box and run whatever else you want to learn from in a virtual machine inside VB.
The problem you may encounter, given that you say you've been only using Ubuntu, is that LFS may be taking a dive from the high platform into the deep end of the pool when you are not ready yet for that experience. You may want to ease into that just a little bit more.
My suggestion for you is to go download yourself a copy of the latest Slackware distribution, and start there. You'll learn 95% of what LFS will teach you just from Slackware alone, without also taking that high dive before you are ready.
And, again, if you don't want to kill your current system, then just install Virtual Box and then install as many distro's as you please (including LFS) as VM's. You get the same experience, without breaking your current working system.
As another commenter pointed out, given the zero cost (other than your time) nature of trying something out, why ponder? If your pondering is that you don't want to mess up your current system, then install Virtual Box and run whatever else you want to learn from in a virtual machine inside VB.
The problem you may encounter, given that you say you've been only using Ubuntu, is that LFS may be taking a dive from the high platform into the deep end of the pool when you are not ready yet for that experience. You may want to ease into that just a little bit more.
My suggestion for you is to go download yourself a copy of the latest Slackware distribution, and start there. You'll learn 95% of what LFS will teach you just from Slackware alone, without also taking that high dive before you are ready.
And, again, if you don't want to kill your current system, then just install Virtual Box and then install as many distro's as you please (including LFS) as VM's. You get the same experience, without breaking your current working system.