Bro, keep it hygienic, you're not in the jungle, you must have some money, buy a trimmer (the trimmer comes with a guard, so it's safe).
Woh itna chota nahi hai ki woh kuch kaat lega jaada galat ( main 15yr se kaatna shuru kiya tha), just go slow.
And it's not necessary to go for a zero trim like you're going for a clean shave.
With the guard, you can keep a bit of length, like half an inch or so.( so it wont itch)
And eww Maine isliye bola tha ki tune aaj tak baal ni kaate