A bit simple as an answer to this perhaps, but it is worth considering that the gearbox does not "care" which gear it is in.
On a Land Rover each gear is strong enough to make the connection. Excess stress will be taken elsewhere on bearings , on gearbox mountings ??... But obviously it can happen that the engine itself will not be able to power the selection you have made. It will soon tell you this...if it does not "like" what you did ....it will stall .
A well maintained engine is easily able to move an unloaded Land Rover from rest along a hard surface on the flat in 2nd high ratio .. But, as others have reminded in this thread , the clutch should not be used as a variable speed device . If used wrongly, unnecessary clutch wear will take place, and then later, perhaps when the clutch is stressed by a gear change up a hill, it may be too hot or too worn, and may slip.
A clutch should be "in" or "out" never held part way - getting hotter and hotter - for long at all.
So if the engine would stall once the clutch is released quickly, arguably, this fact alone shows you were in the wrong gear ?