How to pull data from YouTube API to a Google Sheet with Channel Links

I'm a complete newbie here. I tried many scripts to do the below. (Obviously from other questions here in stackoverflow - I'm not that proficient in writing codes yet)

My goal is to,

1. Read the channel ID from the channel links from the Sheet 1 A2:A
2. Pull Total Subscribers Count to B2:B
3. Pull Total Channel Views Count to C2:C
4. Pull Total Number of Video Uploads to D2:D

I have the API key already and tried almost everything that I can do with my knowledge to make this happen. But, I couldn't get it to work.

Can someone please educate me on how I can make this work?

I'd be so grateful for your help. Thanks in advance <3