Thinka can read your existing configuration by reading your ETS (v4 or 5). ETS contains information about your devices, but it is somewhat limited. Start of by importing your ETS file and Thinka will get as much information as possible from it.
Thinka will try to derive the type of accessory, its group addresses and (based on language preference) to corresponding room. See this video on Thinka's video channel.
You can improve your ETS project such that Thinka can parse your information with absolute certainty. Read more about this in our tutorial.