In 2015, he scored 378 marks in the Kenya Certificate of Primary Education (KCPE). He joined Baringo High School through help from well-wishers.
In 2019, he scored an A- at Jomo Kenyatta University of Agriculture and Technology (JKUAT) and graduated with a degree in clinical medicine in June 2025.
Katana, the youngest candidate in the Magarini by-election, is running on an independent ticket. "I'm not intimidated by their big cars and money," he said.
"Our people face many challenges, such as access to healthcare, water shortage, perennial hunger, youth unemployment and the squatter problem. That is my focus," he said.
He said Magarini has lagged behind in terms of development for many decades.
"When people talk about AI and technology, in Magarini we are worried about basic things like water and health services. It is a shame," said Katana.
His campaign slogan is "The future is now."
"We are the future. We need to stand as soldiers and fight for our parents, fight for our generation and the next generation," he said.
The 25-year-old doctor said he decided to halt his career to serve the interest of the people first.
"I don't want to administer drugs to people in the hospital who are suffering from high blood pressure because of the high cost of living. I want to fix the causes," he said.
With limited campaign resources, he moves around on foot with a group of youths and women from village to village selling his political manifestos.
''I have a group of fellow youths and women. We have been walking from village to village day and night to talk to people and tell them it's time for a new beginning. We are not waiting for money or capabilities; we are beginning now, he said.
The young doctor is in the race dominated by older politicians with deep pockets and supported either President William Ruto or ex-Deputy President Rigathi Gachagu.
"I have seen people selling their votes to corrupt candidates. Those who buy votes can never help our people because the relationship is transactional," said Katana.
Katana said he wants to encourage the youths to register as voters and show up in the next general election to vote for better leaders or vie for elective posts.
''I want to tell my fellow Gen Zs we must not fear. "It's our time; let's register as voters and change the system," he said.