build my upper body strength

I need upper body strenth in my career. I have built up enough doing my job, but would like to strenghten more to prevent injury and make my job easier!!
I have an appointment with a personal trainer in a week. Very nervous, but I want to learn some tools that I can stick with at home.

i have, like no upper body strangth, so i awnt to build it up, just for everyday life, but also so i can improve my ock climbing skills,