I'm going to share with you what other members shared with me because I will be forever grateful to them, you know who you are

S
Ok, so I loved my Nautilus mini, I still use it when I'm out sometimes, I bought a Subtank Nano and an Istick 30w, pretty much knowing nothing, I'd never lung inhaled, I tried to mouth to lung it at 20w and it got very angry with me, it would spit and pop and tell me off, actually, I didn't even know what lung hitting was, been a smoker of 25 years, I came to the forums and started learning, I tried a lung hit, it felt weird and a massive throat hit due to using 12mg of nic and rubbish juice I was using, opened the airflow up, tried everything but it would just pop and spit and flood or dry hit, you name it, (I wouldn't recommend a Subtank now btw, there are better tanks and coils out now) I thought, this isn't for me, it all just felt too weird and complicated. I ended up selling the Nano, a month later I was given a Subtank mini, I had run out of coils in my Nautilus so I was forced to use it, back to the forums I went. I basically lived on here for a few weeks, after sometime I found I had to lower my nic level, get higher vg juice, found some great vendors, learnt all about coils, loads of things really, doing direct lung inhales, I started getting used to it, I found my love of custard juices (Mike from Isle of custard, your a legend), lowered my nic level down to 6 (now 3mg).
Now lung hitting is very natural, in fact mouth to lung feels weird now. I am now vaping a Starre tank at 0.25ohm, around 60w and going back to the Subtank feels like the Subtank felt, going back to the Nautilus. Once you get used to it, there is no going back, those were the words members on here told me and I was like....hmmm but it's true, once you get it right and discover the flavour and the warm smooth satisfying vape you can get, you really can't go back to other tanks.
Now I'm not saying you are a noob like I was but I would strongly consider trying another sub ohm tank again with a nice box mod, for me, there is no better way to vape, to just screw a coil in, fill it up, put it on you mod and vape. This is the happiest of been since I started vaping, finally nailed it.