How to Trim Leg Hair So it Looks Natural?

Yes you can, simply by using a guard on your clipper. I would use a #3 clip to start and if length is still to long go down to a #2 with the lever open(lever pulled down for longer length) and can simply close the lever to get a #2 shorter.

I recommend you brush your hair down with the grain (all hair flows 1 way evenly in natural direction).

Then take your clipper and cut your hairs going with the grain (flows natural) if you choose to cut the hair in the opposite direction (most people do this as it seems natural to cut a chunk of hair off) it will seem as the hair is freshly cut and sharp, hence why you must cut with the grain cutting only the longer hairs that can reach the blade with your guard on. You will not see a drastic change but the bulk of your hair will be gone. it should seem as if your brushing your hair down with your clippers rather than a comb/brush.

This is how you properly cut hair to look natural at home rather than seeing a professional and generally works on any part of the body.

Hope this helps.