There are two in-person NEURON tutorials in the near future:
June 11-16, 2023: NEURON summer course in Dayton, Ohio. See details and registration here.
July 15, 2023: Building mechanistic multiscale models with NEURON, NetPyNE, and TREES in Leipzig, Germany as part of CNS 2023. See details here. Register for CNS (be sure to register for the tutorials) at cnsorg.org.
Remember, if you're looking for an extensive introduction to NEURON and can't join us in Dayton, you can always watch 2021's two month long summer webinar series: https://nrn.readthedocs.io/en/latest/videos/neuron-course-2021.html