I guess you haven't found the necklace that gives Magic Missile an additional d4 for each missile making anything in the game a piece of cake, or the Staff of Arcane Blessings, making it impossible to miss with spells that have attack rolls for 10 rounds.
Wizards are literally the strongest class, if you know where to go and how to get there safely, early.
My suggestion, go through to the grove killing everything you see using the Nautiloid tanks on the devils for a neet extra 100xp making you level 2 by the end of the intro.
Pick up Invisibility and Misty Step at level 3, buy a scroll or two of feather fall and run straight for the well in the blighted village.
Pop invisibility and walk to the room where you find a nice pair of boots that make you immune to web, pick up the scrolls and pop invisibility again.
Walk to the main room with the spider matriarch, set to turn based and cast feather fall.
Pick up the amethyst if you want, then jump into the big hole in the center of the room.
Have a long rest as you land.
Cast featherfall again and jump down to the west towards the mushroom minefield, poke them with a bow, crossbow, cantrip or whatever to clear a path to the Mushroom people village.
Head in and buy or steal the Necklace - you now do the most damage of any class or build each turn (Force + Psychic which is almost never resisted.)
Have another rest, then cast invisibility and walk to the arcane tower.
Pick up the books, boots, petals etc. etc. you know the drill.
Then top floor, Shove the big boy robot off the side.
Kill the rest or invisible shove them off.
Grab the ring, head to the basement and claim your Staff.
Congratz, you are now the most powerful character in EA and it took less than 2 hours and no party.
Alternatively, abuse the fact that you can learn Divine Spells and pick up Cure Wounds and Healing Word and do a Dex Wizard who uses the Brood Mother's Necklace (take from Kagha), Hellrider's Gauntlets (pickpocket from big man Tiefling) and the Whispering ring (pickpocket from Volo) - optionally buy a +1 crossbow from Mr. Tiefling in the grove or Dwarf lady in the Mushroom people village. You now have a character that can give itself resistance to bludgeoning, piercing and slashing, give itself a short-term bless and poison their weapon with a bonus action. Guess you win.
