Every delivery device has a learning curve to get the most out of them.
The wicking material surrounds the coil inside the head, between the wall of the head & coil, the silicone seal on top of the head blocks the view.
With the head not installed into the base yet, drip a drop down the center let it sit on its side to absorb into wicking material, 1/4 turn another drop let it sit on its side, keep turning & placing a drop until you get about 4 drops in it. You can put a drop in/on the wicking holes in the side of the head for good luck.
Install head tight into base, fill tank, thread base & tank together just snug not tight, take a few un powered primer puffs. When it is ready to press the fire button & vape you should be able to detect at least a hint of the flavor from your juice.
Start off at a low power setting to prevent burning / scorching the wicking material & to 'break in' the head.
After a a couple dozen vapes at low power slowly increase power taking a vape or three on each setting until you find what tastes best to you or you get a off, weak or slightly burnt taste. If that happens turn it down.