Hi  I am new to cisco products. recently i purchased a cisco asa but unable to change the default ip address to our network ip. how should i configure if the inside ip is 192.168.1.1, outside ip is 192.168.2.12 and internal network ip is 192.168.3.1-...

I recently purchased a cisco asa 5508-x and tried to change the default ip to 192.168.10.1 but failed. my lan ip is 192.168.10.x and i have many machines with fixed ip. what is the best workaround? tq