Oh well for google drive you need a google account and then go into google drive, once your there you click the rainbow plus button that says new, then file upload, then you find your photo and double click on it, then wait for it to upload and after it's done to get the shareable like you find the photo in your google drive and double click it to make it bigger, then click the 3 dots in the corner, click share, click get shareable link, and then post the link in here
Or in imgur you just go onto the website, click the new post button in the top corner by the logo, and then you can click choose photo/video, then find your image and put it in, then post it and a pop up will appear where you can copy the link
If your wondering how to make your drawing from a program to a picture you just click save as on your drawing and then then change the save as type section to png or jpeg
Hopefully this is helpful in some way?