[bashwizard]

"First, you need good mechanical keyboard."

No, you don't.

"a) buy keyboard with blank keycaps;"

No need. Just don't look at the keys while typing.

"b) if you can't buy such keyboard (you really should), try to pull out keycaps and randomly change their order;"

No need. Just don't look at the keys while typing.

"c) put blanked or some non-transparent sheet over your hands."

No need. Just don't look at the keys while typing.

For real, there is no need to complicate things. Just start out slow and you'll gradually increase your typing speed as you go as long as you're touch typing.