Are you planning on breaking the wheel all the way down? Easier to clean and polish the hub and rim , once the spokes are removed.
Then new spokes and nipples. A spoke wrench , guessing a 14 gauge and / or a flat tip screw driver. Plenty of videos on how to lace wheels for 3X pattern. If you are not comfortable truing take it , to your LBS. A lateral, radial truing and dishing is about $40 in my area. A complete wheel rebuild (minus parts ) is $80. Good luck