I go through Spidell, its a virtual 2 day (4 hours each day) course...they do have some in-person seminars, which is what I prefer and usually take, but since Covid, they havent brought back anything near me yet!

https://www.caltax.com/product-category/webinars/live-upcoming-webinars/

I take the one at the top of that list each year.  They do a pretty good job.