For a noob it seems you jumped straight to the top performing equipment. You
might have your terminology a bit off track which can cause much misunderstanding when asking a question.
The first time I quit analogs, some of the mech mods required batteries with an internal safety built into the battery. Those mods that required this would not work with a battery that lacked the internal safety feature. And visa / versa.
A big condition with the batteries for sub-ohm use is the fact of them being High Drain.
You might want to spent a few dollars for a simple mod designed for sub-ohm. Here is a suggestion,,,
$21.08 Authentic KangerTech KBOX 8-40W VW Variable Wattage APV Box Mod - 1*18650 / stainless steel + aluminum alloy / silver at FastTech - Worldwide Free Shipping
This one (up to 40 watts) does not display coil ohms and has preset wattage options.
$32.38 Authentic KangerTech KBOX Mini 50W VW Variable Wattage APV Box Mod - 1*18650 / 7-50W / zinc alloy / white at FastTech - Worldwide Free Shipping
This one (up to 50 watts) has the ohm display. ( Battery can be charged in mod )
My 15 piece mod collection consists of both of these mods, which are relatively cheap.
What I forgot to say is, Welcome to the club Arj89.