Start at level 5. Use "area 5" command. Go to every area with the max level listed at 5 and explore it. Thoroughly. Do the same every 5 levels. 10, 15, 20. Pick a class that can do something useful by itself (basically anything except a full mage.) Bard, warrior, ranger, thief, assassin are all easy picks. Double points if you get lore at 100% (bard, gnome, svirf) or the scroll skill (identify scrolls are cheap in Galadon).

Sounds like a daunting task, but if you have any interest in area lore, secret knowledge, or quests... You'll pick up a large store of knowledge.

You'll learn lots of things. Preps, gear, area connections, game lore, quests... Quests especially are nice to know if you intend to play mages since, imo, it's tough to rank a mage solo without them.