Hi and welcome to the Chiari forum.
Having surgery does not guarantee u will have a "normal" life or college experience.....all surgery can do is restore CSF flow and we hope it lessens symptoms....but it can take up to 2 yrs to completely heal ...inside as the nerves take longer to heal then the incision.
Having other related conditions can also affect how long it may take u to recover....so u do have to rule out ALL related and non related conditions FIRST!!
And if u r patient, and will rest and not rush back to daily activities can help u with ur recovery....u will need to walk, move ur neck etc....but some want to do everything since they do tend to feel better post op, but doing so can cause major set backs....
Last make sure u have a true Chiari specialist and not just a NS that will do this surgery,...as that can also factor into ur recovery.
We do have a list of activities to avoid with Chiari and Syringomyelia in the Health Pages....
http://www.medhelp.org/health_pages/list?cid=186
May I ask, have u had a CINE MRI and a complete spine MRI to look for other related issues?
How have ur symptoms changed since u were first DX'd?