For the Kallitype process you need a UV light source. The sun is the obvious choice, but don’t know what sort of weather you have there. However, why not wait for a sunny day and experiment. If you decide you want to then continue with the process, perhaps buy a UV lamp. I use a facial tanning lamp I bought on ebay for about £20 which works fine. I disabled the timer on it so I could have it switched on for as long as I liked and put a timer on the wall plug. I mounted this in the ceiling of my darkroom and in this way I can set the timer to come on and go off during the night when I am not in the room, but fast asleep.
I should also mention that facial tanning lamps have an ideal short distance between the light and the subject for even illumination. So when exposing, my neg material is on top of a stool on a bench, about 12” from the light source.