Do your research --- visit the area (with someone of course, if it makes you feel better) during the day and at night
Then do more research online --- no place is Utopia. But only you can determine whether a neighborhood is suitable for you
There are sites you can visit, starting with
Spotcrime is another http://www.spotcrime.com/ca/oakland
Then compare occurrences in these areas to where you currently live. How does it look?