+1 on the PFD.
Just know your limitations. If you aren't accustomed to fast water, stay out of it. Work your way up to it.
I'm a flat water kayaker. I'm too old and slow to play in white water.
There were 2 young ladies on a lake in a kayak when a storm came up. One fell out of her kayak. Game Warden Field Notes
Two girls learned the importance of life jackets at Falcon State Park. A Starr County game warden got a call from a woman who said her daughter and a friend had drifted out from shore on Falcon Lake in kayaks. She said the wind was blowing them toward the middle of the lake and the girls couldn’t paddle against the wind and waves. Almost immediately after hanging up, the mother called back and said one of the girls had flipped out of the kayak and could barely be seen. The warden asked a state park officer to assist in a rescue and as they launched their boat, the wind was blowing hard and the waves were white capping on the lake. A red life jacket was floating between the waves. As they reached the floating girl, she could barely speak from exhaustion. After helping her into the boat, she said she almost gave up hope of being rescued. The officers then went to the other girl who was still in her kayak and got her safely in the boat as well."