Only if you want to punish yourself
Dwight Klemin and Al Buhr, both with all the credentials and experience needed to make their recommendations legit recommend using a double taper line FOR THEIR THCI CANDIDATES-- i.e. a big old single handed line IN ORDER TO MAKE IT MUY VERY DIFFICULT AND REQUIRE THAT CASTS BE DONE JUST SO.
If you can find a weight forward that has enough head weight -- say 550 grains if you are building an 8 wt, you could try it, but remember single hand system measures the weight for the first 30' of the line. Spey lines are weighted at 40, 55, 65 or 80, depending on shooting head, short, mid, or long belly. If you have a typical single handed weight forward line you will find that the overhang you will naturally try is way too long and you will be very frustrated.
Although some would say it is easiest to get fishing with a shooting head system -- like a Skagit for use with sink tips and heavy flies, or a Scandi head for floating delicate stuff, if you are going to learn to cast well you should learn with a short belly line -- about 55' for rods 12'6" to 14'.
Get a lesson or two. Wow, what a difference it will make.
"The charm of fishing is that it is the pursuit of what is elusive but attainable, a perpetual series of occasions for hope." John Buchan