I made 10nl today.

I suspect you'll get a lot of the same advice I would. Stick to your current game until you have a decent sample to tell you how it's going. After you have some number of hands (I don't know, like 10k?) go through your results in PT or whatever you use and see if there are any adjustments to be made.

Most of all, if shit hits the fan, know when to move back down.

As for the specifics of 100nl, I hear a lot of people saying that it's sometimes even fishier than 50nl.