Kayaking recommendations

I’m looking for a kayak route. I’m a beginner and I’d be taking my 13 yr old with me. So far we’ve only done Battleground Lake. Nice, but small and crowded so you can never get away from people.

Lakes are ok but I’d like to go down a river. In an older post someone mentioned starting at Cedar Creek boat launch and going to Woodland. Has anyone done that? How long does that take? Any tricky stretches?

Also, how do you get back to your car if you do a 1-way trip like that? Someone stays with the gear while the other Ubers? Have someone pick you up? Just curious how others manage it.