Put your paddle behind you across the kayak. Reach back with both hands on the paddle and lift yourself out, sliding back over the seat while putting a leg over each side and stand straight up. You'll get it.
Stretching, exercise, Advil, B-complex, D-5000, a good multi vitamin...all part of my daily regime. At 68 I can still get around ...well....like I'm 54 anyway.Gotta work at staying flexible.Rg
I'm a few months from 70. I used to have the same problem. I use a sit in kayak and have found the best way to get out of the kayak is to get the kayak parallel to the shore as close as you can. Then place the paddle in front of you with one blade over the shore. When you press down on the paddle and raise yourself up into a bent over standing position your weight pins the paddle to the shore and stabilizes the kayak. You can then step out with your shore side foot without tipping by leaning into the shore side. Sounds complicated, but it is just using your weight and the shore to hold the kayak from shifting.