There are two NEURON one-day tutorials in the near future:
June 28: GUI/theory/scripting overview -- free and online; register at https://framaforms.org/incfocns-software-wg-cns2022-satellite-tutorials-registration-1654593600
July 16: using NEURON and NetPyNE through the cloud; in person event at CNS 2022 in Melbourne, Australia https://cnsorg.org/cns-2022
Remember, if you're looking for a more extensive introduction to NEURON, you can always watch last year's two month long summer webinar series: https://nrn.readthedocs.io/en/latest/videos/neuron-course-2021.html