For one change at a time, you mean that applying e.g. step 1 shrinking sda2 by 10G. Instead of bulking e.g. step 1-3 and apply?
Yes, press the [Apply All Operations] button after each single step to apply one step at once.
For step 3 and 5 I encounter "Failure to boot is most likely"
The message is just a warning. For step 3 (moving sda5, ext4 Fedora boot) it shouldn't matter because GRUB will be installed in and immedately following the MBR and will boot Fedora from sda5 where ever it is on disk. For step 5 (grow sda6, lvm2 pv fedora) the warning doesn't apply because Fedora doesn't boot from that partition. The worst case scenario is that you have to re-install Fedora, which you already mentioned as a possibility.
For step 6 I could not open terminal from gparted live. Clicking terminal nothing happens. Could only use gparted. Not even exit (assume meaning shut down).
Make sure you are double clicking on the Terminal and Exit icons.
nonetheless, sudo lvs lvm FYR (from normal boot)
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
home fedora -wi-ao---- 33.00g
root fedora -wi-ao---- 22.00g
swap fedora -wi-ao---- <3.90g
My above instructions are to grow root. If instead you need to grow home, ajust the name used in steps 6 and 9 like this:
sudo lvm lvresize -l +100%FREE fedora/home
sudo gparted /dev/fedora/home