Here's what I did:
I opened a blank file with Word, clicked on Insert - Symbol, and inserted lots of potentially useful accented letters, umlaut letters, and other symbols (including ° which unaccountably is not on an English keyboard). Saved it as a TXT file which I open each morning so that it goes in the system tray (I think that's what the bar at the bottom of the screen is called).
Now I can bring it up when needed, to copy & paste a given symbol into an eMail etc.
By the way, I've noticed how English-speaking people often confuse Berg and Burg, probably because they're pronouncing them both böög. They're both pronounced as spelled (a strange German habit!). Berg means mountain or hill; it's related to our word barrow in the sense of burial mound. Burg means citadel or fortress; its Old English equivalent gave us borough. Admittedly an ancient fortification was usually on a mound, so the word probably has the same origin.
Sorry not to be able to contribute anything on the Wapperl -- not even sure I'd call it a crest, so perhaps "heraldic device" is appropriate.
