content manager made easy = WYSIWYG (what you see is what you get)
Administer -> Site building -> Modules (download and install by pasting the link from WYSIWYG module and WYSIWYG Bridge)
Administer -> Site configuration -> Wysiwyg (lists which editor modules you can use and a helpful download link) e.g. TinyMCE (Download) Not installed.
Extract the archive and copy its contents into a new folder in the following location: sites/all/libraries/tinymce
Administer -> Site configuration -> Wysiwyg
Input Format = Full HTML = TinyMCE 3.8.8 (NOTE: Enabling tags in FILTER SETTINGS -> LIMIT ALLOWED HTML TAGS does not seem to help Filtered HTML)
Edit the profile of your WYSIWYG editor to decide which buttons/functions are displayed.
Up until now you only get bold and inserting images that are already uploaded... (ENSURE IMCE IS ENABLED AT THE END)
Administer -> Site configuration -> Text formats (Input formats) Ensure that the "Content Manager Role" (or authenticated user?) has access to Full HTML
Also you can set the default format to Full HTML
(alternatively you can create a more limited input type role that matches your paranoia)
IMCE (image manager) (with the WYSIWYG bridge module)
download and install (upload to /sites/all/modules) and enable module Administer -> Site building -> Modules
Administer -> Site configuration -> IMCE -> User-1 Configure any specific settings, then give a role (e.g. Content Manager) permission
Administer -> Site configuration -> IMCE
Enable the Image button (as IMCE is accessed from the Image plugin).
Enable the IMCE plugin in the plugins/buttons configuration of the wysiwyg profiles of your choice.
Edit the profile of your WYSIWYG editor to decide which buttons/functions are displayed. You MUST include the checkbox IMCE...
Ensure the future "content manager" role has create content permissions Administer -> User management -> Roles = Add Role Administer -> User management ->Permissions
Then assign that role to the user
Finally a user with the appropriate role (e.g. "content manager" above) can insert bold/underline/etc. and insert images (and upload photos using IMCE).