Perhaps it helps me to better stay focused..

[Silverobama]

Besides working as an English tutor, I also work as a taxi driver. The other day, I drove a friend Bob to the airport. On our way we talked with each other in English and his friend who was also with him in the car said "Your English is fluent and better than many people who I've talked to. Why did you choose to drive a taxi?"

I said "Driving helps me to better stay focused. I like driving and am just doing what I like. Sometimes, you know, people do things out of no reasons at all. They just like it."

Is my sentence natural?

 

[emsr2d2]

Besides working as an English tutor, I'm also work as a taxi driver. The other day, I drove a friend, Bob, and a friend of his to the airport. On our the way, we talked/chatted with each other in English and his friend who was also with him in the car said "Your English is fluent and better than many people who I've talked to. Why did you choose to drive a taxi?"

I said "Driving helps me to better stay focused. I like driving and am just doing what I like. Sometimes, you know, people do things out of no reasons for no reason at all. They just like it."

Is my sentence natural?

See above.
Note that I didn't change what Bob's friend said because, presumably, you wrote it verbatim. If you'd created that part yourself, this is what I would have done:
"Your English is fluent and better than many people who I've talked to."
Outside of an English-speaking country, if someone said that they felt you spoke English fluently, I wouldn't expect them to then qualify that by saying that's better than a lot of people.

 

[5jj]

"Your English is fluent and better than many people who I've talked to."

My pedantic side would make me say "Your English is fluent and better than that of many people who I've talked to."

 

[teechar]

Your English is fluent and better than many people who I've talked to.

You're not comparing like with like.