I'd say it's equipment that's lacking, You have progressed past it.
But nothing is cheap on the good side of equipment.
First you need a mod, I'd suggest the innokin MVP so you don't need to buy batteries and charger as it's built into the MVP.
If you prefer to use replaceable batteries and charger so you can swap charged cells in as needed is suggest SVD or Vamo.
The MVP and SVD both come with a I30 tank which some like, but I prefer Kanger ProTanks. Either the PT2,PT3 or PT Aero.
You could spend as little as $70 or as much as $150 on the stuff I listed.
Why buy all this? Power and quality designed products that came about due to the small cheaper stuff not able to deliver what people wanted.
I'd suggest looking for a local vape shot and look at what you may like and works for you. Buying local is almost always more expensive over buying online, but having a local shop to help while your new can be a big help.
Once you try the good stuff you will be amazed at the difference!
Oh and stick with a 70/30 or 80/20 PG/VG ratio on your juice as suggested above.