Despite the length of the material that can be overwhelming at first, a stretchy wrap is easy to use. The most important rule: tight.
As its name indicates, a stretchy wraps stretches, even more so after carrying your baby for a while. So get it tight from the start, and you are in for a comfy and safe ride.
Take a look at the "Fit Dad" video on Youtube. That's how tight it should be.
And as always, remember the TICKS rule: Tight - In view at all times - Close enough to kiss - Keep chin off chest - Supported back.