Learn Ethical Hacking from Scratch

I am doing the ethical hacking course.

I currently dont have a wireless adapter so what section specifically should I skip to?

Also should my Kali Linux be connected to a Wi-fi as when i type in ifconfig it doesnt come up with wlan0 as shown in the tutorials?

If you don’t have wireless adaptor then you cannot do any type of Wi-Fi based attacks. Apart from that you should be fine. For other materials, instead of wlan0, you will see eth0 or something else for your ethernet (wifi on your host machine comes as ethernet on your Kali in VM)