Hi!
First of all I'm just a beginner as well, started a while ago and finally have some tiny cultures going. There are a lot of experienced tissue culturers on the forum that would offer much more help and some are quite active.
For sterilization I'm experimenting with 500 ppm NaDCC for 8 hours and then 4% PPM for another 6-8 hours, however 4-6% PPM alone should do just fine. Bleach should work as well but be careful with the concentration and duration to prevent cooking the seeds. For media I use 1/4 MS + 25g sucrose + full strength MS vitamin mixture + 0.5ml/L PPM and 7g gelagar adjusted to 5.2-5.4 pH. A few N. fusca seeds sown a month ago are germinating, glad at least some survived the sterilization.
Hope this may help!