Issue in adding a custom column which should remove the initial numbers from the start of the string

Hello,

I am facing a issue in adding a custom column which should remove the initial numbers from the start of the string.

In excel I used to do it using formula: [=IF(ISNUMBER(VALUE(LEFT(W2, 1))), MID(W2, FIND(" ", W2) + 1, LEN(W2) - FIND(" ", W2)), W2)]
but in Power Query editor I am not able do so.
Any help is appriciated. Thank you!!