Hi there and welcome
It is requiring you to connect it to iTunes on your computer.
Connect it to your computer, open iTunes and tell me what iTunes then says please.
ok, this means it has encountered a serious error, you will need to attempt to factory reset it. It will wipe all data off it and return it to new, but you cannot avoid this.
Choose to do this and tell me the results please.
It depends if they were synched onto iCloud (if this was enabled it) but you will need to see.
You have to do this reset sorry.,