I've switched employer and been through the "fun activities" recently. All remote though, because COVID. Two weeks of online lectures and "icebreaker" activities. It was a weird experience, and I think the actual, useful information could have been condensed in a single day, instead of two weeks.

The actual, useful onboarding, was mostly me asking my colleagues where to find the things I needed to find. I can program, I can learn what I need to learn, I just need some good pointers and for my teammates to be patient, supportive and understanding.