Returning player after 20 years needs guidance Follow

Hi EQ community! I have just located my character from E'ci, which has now merged with Tunare. Lvl 70 Wiz with no clue how to get back into the game. I have tried youtube videos and guides in various forums but i haven't found any detailed guide that treats me like a complete newbie - which i feel like i am now. After 20 years of layoff, i have forgotten everything!

Is there a place any veteran (especially wizards) can refer me to, so that i can read up and learn:
- How and what server to join once I re-subscribe? I have since moved from USA to Asia.
- how do i get/use mercenaries/new familiars/mounts
- also read about some loyalty quest? I should have a lot since my actual playtime is thousands of hours from the late 90's.
- any epic weapon update?
- what packages/upgrades/paid-for upgrades should I buy?

so so many questions, but I am excited to revisit all my old haunts. I dearly miss all my old guild members from Nocturnal Souls.

Regards,
Shahx