Definitely start out with dildos mate and teach yourself, just jumping straight into will be uncomfortable and not enjoyable - but once you're there - it is a beautiful feeling! :-P
Reminds me of when I was at school. I was never as lucky as this with this many at the same time but there were two football lads who would regularly use me whilst I was jock in the outdoor changing rooms. Good times. I often wonder how they’re doing nowadays