Hi and welcome to ECF.
The Kanger Subox Mini Starter Kit was my first my choice and regretfully I had the throat burns and coughing fits during my first few days aswell. Its important to start slow and on low wattages. It is even more important to saturate your coil heads with an adequate amout of juice before you start vaping or else you will burn the cotton. Once burnt the cotton is not reusable. Remember to let your new coil head rest in a tank full of e-liquid for 5-10mins for optimum results. Once past the initial woes, you may still require some time to get used to the changes. All of this happened to me and now I'm a happy vaper (3 weeks since I began). It is also imporant to choose the right e-liquids and nicotine levels. I went with highly rated premium e-liquids, and just as equally highly priced.., with 12mg nicotine levels. Once I got used to vaping, the juices were buttery smooth with no throat hits whatsoever.
I must admit there a bit of a learning curve involved, especially with the Subox Mini; however, this mod will also offer more room for play later down the track. Start on low wattages and take it easy.