Your wants and needs.  Yours needs are more important than your wants.  You may want 4 bedrooms but 3 will do.  Make a list of both and decide the really important ones.

Contact your mortgage broker.  They will discuss your current financial situation and determine the amount of mortgage you would be approved for.  This is a very important step.

You will need to find a way to get information on properties that might suit you.  Contacting a Realtor is the best way.  They will sit down with you and go over your needs and want list.