How should I go about placing the content of a field from a content type into a block?
this can be possible by using views which is now in core in drupal 8

step 1 :: go to structure->views->add new views

step 2 :: Add new view ui will be opened

2.1.enter view name

2.2.under view settings select show content of type (the content type     whose field you would like to place in an block ex:your required content type)


3.only check the check box create a block under block settings

2.3.1.under BLOCK DISPLAY SETTINGS select the display format most likely
 (unformatted list) of fields

2.3.2 now save and edit and you are good to go...


step 3 :: now views ui is opened

3.1.on the top left hand side of the page under title

3.2. under fields select add (an pop up ui will open)

3.3. select type content ->select the field types of your content you want to display in your block ex-body and so on and so forth as required by you now apply and save..

3.4. configure field will now open configure as required..you can also rewrite the fields so better follow this link
rewrite fields

step 4 :: go to structure->blocks->place the block as per your required region->and find the block(it will be the same name as block name or view name unless changed)

4.1. place the block as per your wish there are many boundaries like selecting content type etc ...but for now select pages under visibility
leave the check box as default and inside pages type &lt;front&gt;
**remember to add less than and greater than sign as well

4.2.now save the block

step 5 :: in the block ui at the bottom also click save blocks and finally go back to the site

if all goes right you will see the content of a field from the content type in a block using views