All good advice... Paddle Paddle Paddle.... Paddle as hard as you can... Paddle at 125% effort when trying to get a wave.
Some basics;
1) Paddle Fitness
2) Wave judgement (watch and learn, and watch some more)
3) Enjoy!
The Bottom Turn;
1) Yes, try and get to you feet as quick as possible, but while maintaining a steady balance. Cat like prowess!

2) Keep the knees bent, and extend the knees at the bottom of the wave.
3) You will learn good foot placement over time...
The pic below is me, my rear foot and rear toes are right out on the rail, holding a nice rail line. Knees bent ready to extend the knees, to pump for speed... Even though I'm crouching for a cover up, when I came out the other end, I'm ready for a leg extension.