Hi all,Ipurchased an iMac 21.5 Retina 4K 10.13.6 High Sierra four days ago.As I am completely new to the Mac I think it is better for me to update to the new Mojave and start practicing with it, instead of using High Sierra.Any thoughts?
p.s.what a beautiful screen for my pics!
Upgrades rarely have issues on Macs, but if you've imported important data make sure you have a backup you can return to.
Simplest option being to use Time Machine on an attached USB drive (non SSD drives are relatively cheap for high capacity these days, and personally I find the small portable USB powered ones from WD or Segate very good to the extent that unless I need much larger capacity I rarely buy powered desktop external drives now.)
I agree that you might as well just go straight for Mojave (not that I have fully yet!), simply as mac OS tends to get refreshed yearly each Autumn and it's only recently come out.
If you want to however no harm sticking with High Sierra, just be aware that Apple slightly annoyingly stops supporting core security updates for mac OS over a few years old - I like several older versions from when it was named Mac OS X, but most are no longer really up to date security wise.