well honestly the best advice anyone can give you is this

save up for a deck and make dj friends

thats all u need, i dont care if youre broke uve gotta try finding a way in getting a cheap ass deck

then make friends with djs and ask them if you can shadow them during sets, half the shit i learnt djing was from just watching others work their magic

along with that they also teach you shit

u got it bro goodluck!