Just starting out
vaping and going right into cloud chasing? Best setup to change flavors quickly is an RDA (Rebuildable Dripping Atomizer), but those are in the advanced level if you are already confused. To do it right you need to understand "Ohm's Law" which relates to battery safety and battery chemistries, in a DC electrical circuit, mainly how much "Current (Amperage)" you pull from a battery, going Sub-Ohm, any ohm rating below 1 full ohm is sub-ohm. Ohm's are the resistance within an electrical circuit which resists the flow of electrons, lower you go in Ohm rating, the higher amperage of a circuit.
In Ohm's Law there are 4 variables that all relate together, change 1 the other 3 variables alter
Voltage = Flow of electrons from negative to positive
Restistance (Ohm's) = Restriction
Wattage = Final working power
Amperage = Pressure behind the flow of electrons
A battery has to be able to handle and deliver the necessary voltage and amperage, example, a Lithium Ion battery fully charged is roughly 4.2 volts, with a 1 Ohm resistance is approximately 4.2amperes (Voltage divided by resistance = Amperes), a 1/2 (0.5 ohm) resistance would be 8.4 amperes, 0.25ohm resistance would 16.8 amperes, 0.15 ohm resistance 28amperes. You don't dive off a cliff into a river head first without knowing the depth of the river before the water can safely buffer your fall and slow it down (Ohms, resistance). We all have to crawl before we learn to walk, and we all have to learn to walk before we can run. Cloud chasing takes a lot of technical learning and skill to do so safely and reliably.
Have to know Ohm's Law, a basic understanding of how dangerous electricity truly is, have to stay up on the safest batteries and their chemistries, learn what equipment is available and how it operates, how to troubleshoot a problem if one arises, and how to create a coiled resistor safely to put into any circuit. Battery though it can deliver a say 20 amp Continuous Discharge, if you ask it to deliver a 40amp load for 5 to 10 seconds, battery overheats, begins to boil, then vent violently at several hundred degrees either as a jet or as an explosion. Advanced level also means it becomes very expensive, initial investment in gear, not to mention the expense of disposables (liquid as this level burns the most out of any other level, resistance wire (to build coils), and batteries (as pulling the amount of current required heats batteries up, changes their chemistry, decreases their efficiency and life expectancy). A good setup to start without getting into the rebuilding level just yet, gets the initial investment out of the way.
1) A good battery charger, you'll need a 4 bay Li Ion charger, you'll want from top best to minimum, Pila, Xtar, Efest LUC, or Nitecore (i4 or D4)
2) 4 Good batteries - Sony VTC4 2100mah or the Xtar 30amp 2100 (Rewrap of the Sony VTC4) both 30amp CDR and still the king of batteries for
vaping (IMO), Orbtronic SX30 (30amp CDR), LG HE2/HE4 (20amp CDR), Samsung 25R (20amp CDR)
3) A good regulated mod, Kanger KBox Mini, IPV Mini V2 (70watts Max output), IPV V2S (65watts Max Output), Sigelei 50watt, Sigelei 100watt (Dual Battery, you'll need to pair batteries, buy together, charge together, use together, never break the marriage of them so mark them as pair 1A 1B, 2A 2B, etc), Sigelei 150watt (Dual Battery, see Sigelei 100watt), IPV V4 (100 watt dual battery see Sigelei 100watt), IPV V3 (150watt dual battery, see Sigelei 100watt), IPV V3Li V2 (165watt dual battery see Sigelei 100watt)
4) A Sub-ohm tank, Atlantis V2, Kanger Subtank. These tanks have prebuilt sub-ohm coil heads that are replaceable, good air flow, good flavor, and decent cloud production. This gives you an idea what sub-ohming cloud chasing is about while you get your head wrapped around the technicals of Ohm's Law and such before diving into RDAs and rebuilding yourself.
Stay safe out there.
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Sorry, jumped to many conclussions, seen your join date after posting, keeping up for others benefit.
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RDA I'd look at a Dark Horse, Mutation X, Doge, Tugboat, possibly a Madhatter or even a Derringer (Cloud to Flavor order)