Spend some time playing with the App, going through its menus and refer to the manual and here etc. when you find something interesting. The manual
https://dl.djicdn.com/downloads/phantom_3/User Manual/Phantom_3_Advanced_User_Manual_v1.8_en.pdf
is a bit basic or maybe written for minds younger than mine. There's a lot in the App to take in in one go and I am still finding/experimenting.
Likewise when lockdown ends find a an empty field and practices any features that caught you eye.
Cause and experience all the RTH scenarios especially the within 20m of home quirk, that nearly cost me mine. Also if you haven't already do so check out. It is better to encounter an RTH scenario for the first time during a safe low practice session rather than 200m out over hell.
&
Overview of how to register and take the test to fly drones or model aircraft legally in the UK.
register-drones.caa.co.uk
DO NOT update anything unless forced to do so, if it ain't broke don't fix it.
DO NOT fly the outward leg of any flight down wind in high winds, getting back might be troublesome