If your bike has a drop handlebar and over the bar cable routing (aka non-aero) do NOT turn it upside down as that could kink the brake cables. Plus, turning the bike upside down can lead to scuffing the saddle.

I'dremove thetire and the rim tape so I can see if the spokes are protruding past the soke nippples after truing. On a single wall rim that can lea to punctures on the road.

Keep a piece of tape handey ie stuck to the truing stand or bicycle frame and stick that tape on the last spoke you're woroking on if you have to leave the wheel. That way you'll know where to restart when you come back.

Make haste SLOWLY! Do not try to true the wheel by just turning a couple of spokes a lot. Time and patience are your best friends.

If there's a co-op near you it might be worth your while to book a time with them when they're not too busy and they have someone to guide you.

Cheers