Coming back to ESO after years away, where do I even start?

For levelling, queue a random normal dungeon from the group finder once a day. The first one each day gives a big xp bonus and they're quick, so it gets your champion points moving without grinding.

Don't try to pick up where your old character left off quest-wise, you'll just be confused. A few things that helped me coming back: - go through your skills first. Classes have been reworked a lot over the years and an old build probably makes no sense now, so respec and read your bar fresh - the whole map is level-scaled, so you can go to any zone and it won't be too easy or too hard. pick whichever story looked interesting - check your mail and the crown store freebies, there's usually stuff sitting there - join a guild early, even a casual one. the guild traders and people answering questions make the systems way less overwhelming If you want a clean start, rolling a new character and doing the newest chapter's intro is honestly not a bad way to relearn the game either.