New drone owner

Hi everyone, I have recently purchased a DJI mini 2. I’ve played around with it a bit in the house but will soon try and get used to it in an open park. I have 2 questions:

1. any good tutorial videos that would help me get comfortable using it quickly?

2. I live in the UK do I need to register my drone or anything? My understanding is that due to it being <250g I don’t need a permit etc.

Thanks in advance