have you tried driving simulator devices like Thrustmaster? That may help. Many Nepalese especially females whom I have seen start learning to drive by not enjoying the "driving" part of it and taking it as a "job". They feel like it's some kind of pressure that they have to learn whether or not they like it or not.

I do not have any solid advice, but is it too late for you to switch to a career that does not require driving? Like working from home? Tootle and Pathao are not too expensive for occasional trips. In Nepal, ownership of car is extremely costly and motorcycle too is expensive if you can manage with Tootle.

I am a good driver with long experience currently working outside Nepal. Although I am very confident, I really hate driving even with autonomous cars these days.

What about bicycle? You can probably ride them on the side of the roads.

My message inbox is open for you. I share a ditto/similar issue. Please do message me when you can. I am also stuck in the same phase maybe we can join the same driving class.

Well, try to make short accomplishment or milestone; With a lot of traffic I can imagine how complicated driving would be in Nepal but try taking one step at a time. Start with small accomplishment and slowly getting used to roads, traffic, laws and so on. You can may be start or practice whenever there are less traffic and go from there. May be get used to local roads and then step into busy roads. all the best!

3 ways to handle this

1. Keep practice driving in roads with less traffic, the fear will slowly subside as you drive more
2. If driving is out of the question, consider moving to a place near your work place, not only will you save money and time; you will also protect your life from accident
3. If you end up going overseas, find job in big cities where driving is not required (you may use train, commuter van - usually cheap or even get a place near where your work is !!)

I had the similar fear when I was learning driving for the first time. I wished I had learnt driving early in my life. Something in life, it is easier and better if you learn early such as swimming or skating, because when you grow older, your brain becomes rock solid with the stories and experiences it absorbs, stubborn to not change.

Are you talking about Nepal or somewhere else ? The scariest driving is big cities in Asian Countries. In Kathmandu many cyclist become pita bread being in between two trucks. If you have driven any thing in Kathmandu, you should not be fear of anything where people follow driving rules and regulation. \
Think all drivers follow rules and no one hit you, it is not Kathamandu. It is better than Kathmandu, I can do it.