bend your arms, you dont want to straight-arm it. that just exaggerates the wrist problems. you should feel like there is no weight on your wrists. use your core muscles (stomach, lower back, and even legs) to hold you up.
the first week of riding my core was SORE. now im used to it. grip that tank with your knees, bend your arms, and light touch on the bars. itll get easier with some time on the bike. as for your neck...cant help ya there. i dont really have that problem.
2008 ZX-6R, DIY fender delete, jumper mod, Yoshi RS-5 full exhaust, 5150 Concepts rearset raisers, reflectors removed, license plate relocated, Pinebox taillight, K&N air filter, -1/+2