You are welcome! Staring to manage your own content and updates is a challenge, and how difficult it will be depends entirely upon your own technical expertise, understanding of web technologies, and the type of site you are operating (static html, scripts, CMS (Content Management Systems), etc).
My client was having the same issue as you are describing, and was relying upon a third party for the updates to their static html site, and that was a problem both in the timeliness of updates, flexibility, and cost.
When they came to me, I migrated them to a CMS (Content Management System) running on DH which allows them to manage and update their content themselves with a minimum of technical training.
Despite what you may hear, doing anything other than updating text, even with a CMS, necessitates a little training, but it is no more than learning how to operate the CMS system, and preparing and integrating graphics. DH tools make the basic server and email administration simple for anyone.
You might be well served by finding a knowledgeable web developer to help with the migration of your site, and possibly the conversion of your site to a CMS (so that you don’t need to learn the whole “web dev” toolkit to make changes/updates).
Of course, you can do all this yourself, though it might be more cost effective to just contract the initial move/training so that you can be “up can running” quickly.
DH does not “manage” content, but they have provided the Joomla! CMS and the WordPress Blog (and usable as a CMS) system for “automagic” install from their Control Panel, and their system is compatible with a large number of other CMS applications that are easily installed on DH by an experienced developer.