How to create Custom Block Type, Block and how to assign a block to the region in Drupal
structure - > Blog Types -> Add New blocks
Here we can create a one block type
Then we can add a new fields for that block .
After that go with
After that choose block region
Ex: I choose sidebar
Click place block
Than add a custom block using add content block button and select created custom block . and save it .
Then check on the node page . here we created a one block and show into the sidebar .