You're welcome! I found my root beer tasted best after about 3 days in the fridge. The flavor kind of mellowed a bit. If you don't like it after one day, let it sit for a couple more days then taste it. Enjoy!
Sounds like you did just fine. Wait a few days to see if the bottles get hard. I killed the yeast on my first batch of root beer, but I know my water was WAY too hot. Do yourself a favor and get an instant read thermometer for your next batch. Aim for about 75 degrees before adding yeast.
I got a lot of my ingredients on Amazon.com. I was able to find sarsaparilla, star anise and cinnamon sticks at my LHBS. I looked everywhere locally for the sassafras, but it was hopeless. You may have luck at a specialty tea/herb store?
I'm fairly new to brewing, and have been trying my hand at making root beer lately. My first batch was with Rainbow extract. It tasted pretty good before I put the yeast in, but after the bottling it never got fizzy. I know now that my mixture was way too hot and I killed the yeast. Poor little...