The phonetics of German are relatively easy for more Hindi speakers except for a few sounds that are more nuanced.

LetterIPA PronunciationDevanagariNotes
a (on its own)/ə/अ
a (after consonant)/æ/आ
ä/ɛ/ऐ
tsch/tʃ/च
sch (not preceded by t )/ʃ/श
ch (after i, e, ö)/ç/हThis sound is non-existent in Hindi. Approximate it to /h/ while touching the back of your tongue to the upper palette.
ch (other cases)/x/ख़
d (end of word)/t/तFor example, kind (child) is pronounced किंत
d (elsewhere)/d/दFor example, kinder (children) is pronounced किंदर
eu/ɔɪ/ओ ॅ एThis sound is not native to Hindi. It is halfway between ओए and औए.
ei/aɪ/आइThis is a diphthong.
e (first vowel)/iː/ई
e (middle)/ɛ/ऍ
e (end)/ə/अSchwa sound
ie/iː/ई
h/h/हActs as a sound extender like the Sanskrit avagraha ऽ after vowels. Otherwise same as English h (ह)
j/j/यPronunced like English y.
g (end of word)/k/क
g (elsewhere)/g/ग
ng/ŋ/ङPronounced like English ng
r (after vowel)/ʔ/ऽExtends the previous sound.
r (elsewhere)/ɻ/ऋEnglish Retroflex r. Or Sanskrit ऋ.
s (before vowel)/z/ज़
s (before consonant)/ʃ/श
s (end of word)/s/स
t/t/तLike Spanish.
o/ɔ/ऑThis sound is halfway between मोडल and मौडल.
ö/ɜː/ऍPronunced like i in bird. This sound is non-existent in pure Hindi. The ऍ is used to denote it these days.
u/uː/ऊ
ü/yː/ऊ (throaty)Pronounced more in the throat.
v/f/फ़And that’s why Volkswagen is pronounced फ़ोल्क्सवागन. While such consonant clusters might be rare in English, they are common in German. German has f as well, and that’s pronounced like English f too! For English loan words, v is pronounced as /v/.
w/v/व़Like English /v/
y (beginning or end)/j/य
y (middle)/yː/ऊ (throaty)In the middle, it is pronounced same as ü.
z/ts/त्सFor example, Nazi is pronounced नात्सी
ß/sː/सऽLong s sound. This is the only non-Latin alphabet in German.