Start slow. Learn your math. Know your batteries. Just moving to rebuildables will enhance your vape exponentially, so you shouldn't feel the need to "max out" your builds.
28-30 awg wire is finicky - think of a d-string. It's easy to bend, but it likes to hold its original shape. You'll need more wraps as already mentioned. Great starting wire to practice on and should be suitable for rebuilding your spent prefab coils.
Learn that math. There are tools out there to assist you, but I'm a firm believer in having a comprehensive understanding of the simple equations in play, both for safety's sake and to help you build more intuitively as you go. Anyone can wrap a coil to a certain resistance; wrapping a coil optimally, however, is an ever-evolving process.
For me, the ritual of building my coils is part-and-parcel to the vape experience, but I do so with the confidence of a steady hand and an educated mind. Experiment, have fun, don't be surprised if you really end up enjoying it!
Great information in stickies on these forums. Don't just rely on videos.