If you're going to use wireless to connect hAP ac2 to ISP router, then decide which band you're going to use for that ... if you have a choice at all (depends what wireless is supported on ISP router). But since there's some distance between both devices (10m if I see correctly) it'd be better to use 2.4GHz.
In that case you have to reconfigure wireless interface wlan1:
# make sure settings bellow match settings on ISP router wifi (the authentication types as well)
/interface wireless security-profiles
add authentication-types=wpa2-psk disable-pmkid=yes management-protection=allowed mode=\
dynamic-keys name=profile-ISP wpa-pre-shared-key=<ISP wifi passwd>\
wpa2-pre-shared-key=<ISP wifi passwd>
/interface wireless
set [ find default-name=wlan1 ] frequency=auto mode=station ssid=<ISP wifi SSID>\
security-profile=profile-ISP station-roaming=disabled
# remove appropriate wireless interface from LAN bridge
/interface bridge port
remove [ find interface=wlan1 ]
# add DHCP client to wireless interface
/ip dhcp-client
add interface=wlan1
# add wireless interface to WAN interface list for firewall and NAT
/interface list member
add interface=wlan1 list=WAN
Now tape off port ether1 because it's unusable as LAN port. You can convert that port to usual LAN port, it's some more work to be done (come back fpr instructions if you decide it's something you want to do).
Make sure wlan1 connects to ISP router and successfully obtains IP address.
The other wireless band (in my example that's 5GHz band, wlan2) is free to be configured with SSID of your choice and can be used as part of mikrotik's LAN. Add security profile (set PSK and the rest of the settings), set SSID and apply security settings and you're all set.
Did I mention that you should never ever use QuickSet again after you configure your unit?