Maybe I have missed this,

but is there actually already a way to spend Bytes and use the database?

I don't mean trade - I mean, e.g., I totally trust this thing to be around for the next 50 years, and want to store an important document (say, my will, as a 1MB PDF-A) in it's database instead of paying a notary.

How would I have to go about doing that? The whitepaper describes what kind of data structures to create, but what are the actual steps to do so, where do I send them (from the wallet??) and to whom?...  How would I keep a local documentation of the database entry, how could someone (after my untimely demise and loss of my computer passwords) retrieve or verify this document?

The distribution scheme seems to promote holding (or trading) the coins, so does the discussion here.
Totally understandable, but I am also interested in it's intended use...