I agree with the above. Actually, if using a regulated mod, coil resistance is irrelevant, you just adjust the power setting to suit your taste regardless of the coil resistance. 1.0 ohm is an ideal, safer, target resistance for a beginner to start building their own coils.
On a mechanical mod, its a different story. A mech has an extremely limited power range, so resistance becomes relevant. One must create a build which complies with the battery amp limit they are using using Ohm's Law. However, too high of a resistance will result in an unsatisfying experience; too low and it can become dangerous. There's a strict and narrow "safer" resistance range with a mechanical, thus they are not recommended to newer vapers.