The most aclamaided answer is:
Hire a Realtor - Contact a Realtor. If you already like the property in pictures and price wise, visit it.
Make sure the home is really a Foreclosure / REO / Bank Owned. Be aware that Multiple Offers ( a lot or many buyers will make offers at the same time) is always possible. The recommendation is to make your best and higher offer.
If paying Cash, great, but contact the City to check on work orders or Vacant Building issues. City Inspections as well. If financing, check with Mortgage Consultant about your Financing buying a Foreclosure Property in certain conditions.