Youtube.. i seen some good videos before.
There is one method to make a basic key or buy one and then you hit the lock.
Opens up damn near anything really.
Diff locks out there too..
I seen a fancy metal case in a second hand shop last year and knew it was valuable brand new but it was selling for $5 because no one knew the combo lock numbers.
When i got home i had it open in a couple minutes on my first try after looking on Youtube / Google.
No, there as nothing in it.
I sold it for $10 to a friend who was at my house as soon as i picked the lock.
PROFIT !
I recall old Kryptonite Bike locks could be opened with plastic Bic pens too.. that was funny.
Many pop machines when i was a kid could be opened by getting a key for a locking light switch at the hardware store.. go in and borrow the key and go open the machine up
Anyway you need to learn locks.
Newer / expensive ones have anti-lock picking shit in them now though.
So it's about knowing what brand and style of lock you are working with.
Then acquiring the tools after.
You can buy them or make them i think.
I used a credit card lots when i was younger to get in standard cheap locks.
But i never owned a proper lock picking kit.. or tried to make one.
But i know i could if i wanted to
I am good with that sort of stuff.
..find some "blanks"
You want a set of blanks for various locks (you can buy these sets online)