It's not turbulences that you are "up against", as you write. Yes, there willl probably be turbulences, but most flights have turbulences at some point of time during the trip, particularly long-haul flights. Neverthess 3 billion passengers fly per year and the very vast majority have no issues with these turbulences. As turbulences are common in air traffic, planes are designed to get along with them. So turbulences are not your enemy.
What you are really up against is your fears.

These fears are clearly irrational given the general safety record of standard "mainline airlines". And yet, it can be difficult for some people to overcome them. Many airlines offer psychlogical training courses for people with "flightophobia". Maybe a book on the topic can help you, too, depending on how open your fears are to arguments.