There are 2 aspects to lettercarving:
Beginners easily get caught up in the technique of carving itself, which does need a lot of practise to do well, and forget the whole point of learning it: the design, or layout. And a big part of the layout is the actual spacing of letters, how they sit together comfortably and evenly. And here's the thing: you can't rely on a computer to do it for you, though there are certainly programs that can help.
In this tutorial I'll give you a couple of great, easy-to-do exercises that will help you develop your eye for spacing. Fun too! Also try them with different alphabets.