help understand ohms law ??

hello i have just recently tried squonking and liking it a lot but am a bit confused about building the coils with the being nothing to regulate the power i have been playing on steam engine ohms calculator buts its con fused me if i lock in the amps at 30 and volts at 3.7 its says resistance at 0.12 which is ok so dose that mean i cant go any lower that 0.12 ? or dose that mean 0.12 is as high as i can go ?

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