You can use the EUC c-cells from is it Vaperesso? That's what I put in mine, and I'm really liking them (apart from the tank size) although it is an airier draw than I'm used to. This tank may not be the best MTL tank. You can buy items separately or in a kit, if you are looking for a tighter, cigarette like draw, I would recommend the Nautilus 2, which is a fairly inexpensive tank. It is set up for pure MTL hits, with more restricted airflow options and higher resistance coils (it comes with a 1.8 and a 0.7 coil and you can get a 1.6 coil as well, which is my personal favorite). There's also the Ego One Mega, which can be a MTL, that takes the c-cell coils which come in various resistances. I absolutely love the 1.0 resistance coil. Other MTL tanks that might be useful would be the Nautilus X (this has its lovers and haters) and maybe a triton mini tank as well.
You can keep your other tank, for if you ever want an arier draw, and you can really put most tanks on most mods provided they are both 510 threaded, and just adjust wattage etc. on the mod.
Best of luck, you can see how your vape is on the smallest airflow setting, but it will be still probably more of an airy direct lung hit, rather than a true MTL hit.
Anna