Different distros are better for different things. For example, some require give you more control over the OS but are more difficult to learn, or require learning more things at once. Others will be easier to try out but may make choices on your behalf that you don't like - or distribute software in ways you don't like.

Linux from Scratch will have a fairly steep learning curve. Nothing wrong with that, but you'd want to prepare yourself to be cool with things breaking or not making sense for a while.

Puppy Linux is minimalist, which is something people usually only want after they've tried out something else that's not minimalist. I would recommend trying out something more general-purpose and try out different desktop environments and applications first.