You should have a lockring tool and cog wrench (chain whip), but in your case, there is no rush. Nothing is going anywhere for quite a while.

If it were me, I'd take off both after the tools came, grease the threads and reassemble. (You may need the 100C heat mentioned above if the shop used Red.)

The Pedros Trixie is a decent lockring tool and good hub nut wrench. (If you ever go to a fancy 12 600th lockring, the Pedros is far easier to use without slipping than a conventional spanner. I put my Park spanner away and use the Trixie under my bike's toolbag every time I use my 12t lockring.) Make sure you have chain that works with your cogs on the cog wrench. 8, 9 and 10 tooth chain will slip on an 1/8" cog.

Ben