Dumb question - how do you easily insert a photo/image inline with writing text in a post?

when i try to insert an image, i click the 'image' button in the upper buttons zone above the posting space ... but then it asks me for a ’url’...

let's say i have an image in my google drive, or even on my computer local drive...

in my basic e-mail apps, you can attach an image with an ’attach’ button, which a-gon doesn’t provide, or even easier, just ’copy’ and then ’paste’ an image in between blocks of typed text...

i am not the most computer savvy person... any assistance would be gratefully received... :)