The airflow is controlled on the tank if you open it up it will be loose, if you close it to just a thin slit is open then the pull will be tighter. The coils have little effect on this.
The TX coils are all mesh, the coils for the original fireluke are called X series coils and they also fit your tank. They are basically the same as the newer TX coils except this series also has a stainless steel mesh coil which can be used in temperature control. The only other difference between the X & TX coils is the TX uses a tea fiber cotton, this the T in TX series. It makes little difference so if you found one series much cheaper then another just go with the cheaper option. The TX series comes in light sky blue 5-pack boxes and the X series comes in a black box 5-pack. You want one of these kind, not the mesh pro coils, they are sold in three packs and will not fit.
Feel free to ask more questions if necessary and no worries about your lack of vaping knowledge. We were all there once and asking questions was how we learned what we know. So from student to teacher, share what we’ve learned so you may do the same one day.