Hello Zaid, I am using your Kali image you provide on your website (actually link from udemy course) so I assume the drivers for AR8812AU should be fine. Especially if it is recognized correctly.
I am able to change the MAC and to put it into monitor mode. However when I run airodump-ng I can see mainly clianets, 95% of them are not associated with any bssid. In the AP section above I see only 2 or 3 items which is defnitely too little. There is no useful information provided as well. Seems airodump-ng has problems to detect APs and their bssids. The problem occurs on AR8812AU, on another single band adapter from alfa it works ok. SOrry if this topic has been covered somewhere – I am unable to find it. Any help on that?

CH 8 ][ Elapsed: 5 mins ][ 2020-04-02 04:02

BSSID PWR Beacons #Data, #/s CH MB ENC CIPHER AUTH ESSID

C8:D7:B0:CB:74:E5 -1 0 0 0 -1 -1 <length: 0>
80:35:C1:79:39:25 -81 0 0 0 -1 -1 <length: 0>
00:12:2A:73:20:18 -77 0 0 0 -1 -1 <length: 0>
50:D4:F7:92:C9:DF -81 0 0 0 -1 -1 <length: 0>

BSSID STATION PWR Rate Lost Frames Probe

C8:D7:B0:CB:74:E5 D4:25:8B:B2:51:01 -45 0 – 1 0 31 AndroidAP
(not associated) DA:A1:19:F5:FD:85 -43 0 – 1 0 10
(not associated) 34:6B:46:FF:5E:A9 -53 0 – 1 0 28
(not associated) 28:3A:4D:37:9F:35 -57 0 – 1 0 195
(not associated) 02:2F:07:7C:45:CB -61 0 – 1 0 5
(not associated) 0A:A6:FE:BC:74:DC -71 0 – 1 0 4
(not associated) 4C:0F:6E:70:83:24 -59 0 – 1 78 31 NETIASPOT-8B8D90
(not associated) 0C:2F:B0:68:AA:20 -73 0 – 1 0 2 NETIASPOT-732010
(not associated) FE:0B:54:C0:3B:5A -73 0 – 1 0 7
(not associated) 2A:81:BA:70:8C:0E -77 0 – 1 0 14 Hertwig_99_5G,ROLKRAK,Kaer Morhen,ALLTEAM_WAWA,WroPort-E,ROLX,Wifi Hotel Pinei
(not associated) 46:9F:72:4D:29:7E -77 0 – 1 0 7
(not associated) C0:EE:FB:C5:C8:89 -79 0 – 1 0 1
(not associated) 4E:C3:AA:41:92:01 -79 0 – 1 0 4
(not associated) 64:D1:54:90:04:18 -79 0 – 1 265 21 wlan_tramwaje
(not associated) DA:A1:19:1E:52:50 -49 0 – 1 0 12
(not associated) DA:A1:19:7E:3A:38 -57 0 – 1 0 9
(not associated) DA:A1:19:D9:5F:D2 -73 0 – 1 0 5 nc+
(not associated) 74:40:BB:63:61:C1 -81 0 – 1 0 3
(not associated) E0:B6:55:03:05:5B -35 0 – 1 0 22 yogisub-5G,yogisub-5g
(not associated) 6C:C7:EC:43:C0:3F -69 0 – 1 0 2
(not associated) DA:A1:19:64:9D:14 -71 0 – 1 0 5
(not associated) 4A:E8:BE:CA:82:4F -81 0 – 1 0 1
(not associated) 2A:A1:0B:B2:46:7D -79 0 – 1 0 1
(not associated) AE:DD:4C:05:DF:2E -79 0 – 1 0 1
(not associated) 72:70:9E:35:AA:2B -79 0 – 1 0 2
(not associated) DA:A1:19:4C:C4:75 -79 0 – 1 0 1
(not associated) D0:04:01:2D:F2:8F -77 0 – 1 0 8
00:12:2A:73:20:18 50:76:AF:1A:D2:A4 -77 0 – 1 0 9 NETIASPOT-732010