Originally Posted by
noglider
Any bike will do the trick, honestly. It's a matter of what you like and what works for you. Spend $200 or $300 on a used bike and see what you like and what it lacks. Then you'll know what to get for your second bike. Don't upgrade the first bike. Keep it. You'll appreciate it for its beater-ness.
+1
Just get a bike a start riding, if you keep at it you'll figure out what works for you.