With little money to spare, Omar travels to his home village of Tchoffal by bicycle.
The village is 50km north-east of N'Djamena and the journey takes more than two hours on a simple dirt track.
Omar still has lots of family members here, and tries to visit regularly.
Times are hard in the village. It is the dry season in Chad, and villagers have to cope with dust storms and temperatures that regularly top 45C. Everyone is hoping the rains will arrive soon.