Steam Deck

I bought my boyfriend the steam deck oled as a Christmas present and I just got it and I wanted to make sure everything was in there and working but I don’t know how to use this thing I just pressed the power button and nothing happened do I need to charge it first or should it turn on instantly? I already wrapped it so I don’t want to try again but I will unwrap it if I need to… I’ve only ever had an iPhone and it usually turns on right away so sorry if this is a stupid question. Also I had to create an account to buy this but he already has an account would this affect anything? I just didn’t want him to know I bought it.