So cool to hear you're having fun learning to ride a bike, and so fast!
Saddle height: once you get past the feeling that you need to plant both feet on the ground, you'll want to boost your saddle up so you can use your legs more efficiently. I've been told that the correct height is when your leg is straight with your *heel* on the pedal (get someone to hold your bike!) When I do that I get a slightly bent knee with my toe on the pedal. To me it feels better being able to straighten my leg completely once every revolution, so I have my saddle a tad higher.
If you have to twist your hips and "reach" down with your foot it's too high, though.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett