1.) Go to imgur.
2.) Click the green "New Post" button up top.
3.) Click "Browse" and navigate to wherever in your file directory to the picture is, be it Windows or Android (I ain't helpin' no stinkin' Apple users

).
4.) Once select it it will be uploaded. Once you are there, you will see a screen with the newly hosted photo and a box that pops up with the URL to the image itself.
5.) Click on the "v" chevron and click on where it says "Get sharable links".
6.) Copy + Paste "BBCode (Forums)" link here:

Ta da.
Note: You can also right click and select "Copy image address", or you can copy the link they give you in the little box that pops up whenever your mouse moves over the image, and add ".jpg" to (make sure to do this because the link as it is given is incomplete and won't work without it), then come here, click the icon of the photo beneath "
B" so that it inserts a pair of image tags -- you simply paste the complete URL inside those tags and you're good to go. It's actually faster IMO to do these methods than the one above.