Maintenance for the week of November 18:
[IN PROGRESS] PlayStation®: EU megaserver for maintenance – November 19, 23:00 UTC (6:00PM EST) - November 20, 17:00 UTC (12:00PM EST) https://forums.elderscrollsonline.com/en/discussion/668861
I suggest you buy another game for pvp. After seeing the new patchnotes of the new "Balance patch" we've been waiting for for months, i can't say anything more than that i'm starting to lose hope about this game.
If you still want to try: Don't duel random jumping people in the cities since they most likely use a cheese build.
Don't copy a build and expect to be good, that's not how this game works. I suggest you take the good parts you like from them and make your own that works for you. That way you will also get an understanding about how it all works.
Don't run into zergs (i know, it's hard to not do that).
Get selens and be a proc potato if you don't care about anything but AP, you wont need much more than light attacks with that.