VM Instance to Instance Group to Load Balancer NOT WORKING

[bruton]

I don't know how to explain this properly. All I can share is what I experience right now. I'm not a network savvy so I'm trying my best to sort things out with Youtube tutorials. Nothing is working.

So I have external IP from VM instance with apache2 running in it, it works and shows Debian home page.

So I'm trying to learn load balancer, and as I follow through,

1. I setup load balancer now has front end ip that I successfully see can be access via 443 (https) cause that's what I'm after after all (but this is what I get "Hmmm… can't reach this page").
2. Then I connect its backend to the Instance Group I created.
3. And from there, I added to the Instance group, the VM Instance.
4. Also there's a settings that "port name" which has value 443 comes from instance group, I set it to LB's backend or somewhere there that I have to write the "port name" and that name is "https", like literally the word https.
5. I tried to change a lot of settings to see if it works and just put it back if it has no luck

I tried a lot of times to access the LB ip but still nothing. I want to access the Debian Home page through LB ip so I tried a lot of changes to conditions and settings as per documentations and feeling dumber and dumber.

I don't know how to do this, I'm stuck for 3 days now. Sorry guys that I'm tired of watching and reading tuts and now asking as lazy as possible.

But for the last time, I'll try to create again a VM Instance and everything else new. So I can test it again. I might missed a single important default setting that I have change, say from the firewall etc. but my firewall, I set every port to allow, 80 443 22 except for 21.

I don't know what to say, I'm new here in the community and sound pretty much taking advantage of. I hope you understand, I'm also new to GCP.

Thank you guys so much in advance, I'll help people too whenever I got more stacks.