Fresh 80 Efficient Gear Farm

Hello everyone, I just because 80 and my gear score is around 2.3k

I have neither proper guild nor gold. I am kinda confused and seeking for your help.
How can I start to gather my gear more efficiently on both PvE and PvP?

Thanks in advance

https://m.youtube.com/watch?v=6DFP3kuxXPw

For PVE.