android widgets

I have been trying add weather updates directly on my lock screen on Android. I heard theres some widgets you can use but I’m not sure how to set it up . Is it something I need to download or it is already in my phone?

I have a small widget i was wanting to make for Android, but I know almost nothing of coding. What are some good sources, software, examples, etc to learn to code for an Android app or widget? my background knowledge consists of creating wicked awesome websites in HTML.. and i can read and...