/ɒ/ is a short vowel sound.
To make this sound, round your lips a little.
The front of your tongue is low and towards the back of your mouth.
It's pronounced /ɒ/.../ɒ/.

John’s gone to the shops.
/dʒɒnz gɒn tə ðə ʃɒps/
Have you got a lot of shopping?
/hæv ju gɒt ə lɒt əvˈʃɒpɪŋ/
I took my dog for a long walk in the park.
/aɪ tʊk maɪ dɒg fə(r) ə lɒŋ wɔːk ɪn ðə pɑːk/
She said the coffee wasn’t very good, but I thought it was.
/ʃi sed ðə 'kɒfi ˈwɒznt 'veri gʊd bət aɪ θɔːt ɪt wɒz/
Mary took the wrong bus and got lost yesterday.
/'meri tʊk ðə rɒŋ bʌs ən gɒt lɒst ˈjestədeɪ/