For us English speakers, think of "Jagd" as "yahkt"
As others have noted, German uses "j" for the sound of consonantal Y in English (Y as a consonant). It's not aspirated, either, as was suggested, there's no "H" sound before it. It is never pronounced like the soft "j" in English, unless where it appears in a word of foreign origin, and even then, the tendency was to spell the world using German phonetics. So, "jungle" was spelled "Dschungel", because that's how it sounded to German ears.
"A" in German is pronounced like the "a" in "father", not like what we call "short A" in "cat" or "bad" (that's represented better by "A-umlaut")
"G" in German is always the hard sound, as in English "gate" or "game", and never soft, except in words of foreign origins, and even then, if it's the first letter, it's not soft--as in "Garage" for example, (except to the Bavarians, when the affect airs by pronouncing words with a French accent--geology, for example, in Hochdeutsch, is "gay-o-lo-gee", both g's are hard. But the Bavarians had close ties to the French for a long time, and so some folks affected to pronounce it "Shay-o-lo-shee". But I think that affectation went out of fashion by the First World War. Still, they refer to the ground floor of a building as the Parterre, among other signs of the influence of French).
And "D" on the end of a word is normally pronounced very hard, as "dt"