https://www.amazon.com/Beadalon-Square-21-Gauge-Practice-Square/dp/B004F9Q7Q8
This is what I used to get started with wire-wrapping (I'm a beginner too)... pretty low-cost as it comes with both the square wire and half-round wire. Square wire is cool that when you twist it, it makes the wire have a nice spiral-twisted look to it. The half-round wire is to kind of help secure the square wires together, ties them together - obviously you would have the rounded part facing outwards and the flat part touching the square wires. If you need tutorials, check OxanaCrafts on youtube. GL :)