u/Commercial_Class_846

would someone tell me if Delta's 763s are comfortable and safe? I'm an extremely nervous flier so I need reassurance regarding the aircraft/flight path. Its transatlantic jfk to prague so its direct which is great but the age of the aircraft and flying out of a busy airport has been freaking me out a little bit. Also, seats are almost all the way in the back which has seemed to amplify the feeling of taking off and turbulence when its encountered. Is there any way I might be able to sleep through the entire flight so I would miss takeoff and landing? Melatonin?? Thanks for any help