ralphskie Thanks for these suggestions. I have done a full backup of my forum, don't worry about that. Also, I am aware of the fact that they are not responsible for any of that. It is my choice to not wait 4 years and publish my forum this month.
I am not telling anyone to be simple. By specific, I mean things like copying the Assets folder
does not do anything unless you copy vendor/components/font-awesome/webfonts/
which luceos just told me. How are beginners supposed to know all that, if it's not included in the instructions. (That's not a question)
Lastly, I am done with the update and ready to take a good rest now. Just wanted to reply since you seem very supportive and enthusiastic. Have a good day/night.