What makes lead-free solder harder to use?
Lead-free solder requires higher temperature. Heating up parts requires more attention to details; the tip must be clean and sized for the work at hand, the surfaces must be clean, etc. Basically, the same as leaded but you can't be sloppy.

If you never soldered with leaded, all this will easily be learned in the beginning (I started soldering as a kid many years ago, using pure tin). Once you know how to do it there will be no difference. I switched to LF-only some years ago so that I don't need to maintain separate lead-free environment in my place of work.