Between 6-15 months, anxiety is normal. Babies are supposed to exhibit fear, particularly "stranger anxiety" during this time. There is lots of research on the web regarding infant/toddler anxiety.
As far as walking goes, all kids develop differently and as long as you're not pushing she probably is ready to start learning to walk. She wouldn't stand if it caused her pain so her bones most likely are ready.

Shari
Mom to DS 10, DS 11, DS 13
Ability doesn't make us, Choices do!