One option is just to upload them directly from your pc, but when you do that the pics all go to the end of your post. You can't nest the pics within text as far as I know, but it is an easy alternative. Just scroll down below your post to "Attach files" example:
It is easy to place the images where you want. Upload them one at a time using the attach (paper clip) icon pop-up tool. Then position the cursor where you want the image and click on the drop-down arrow just to the right of the paper clip. Click on the image name that you want to place where the cursor is in your editing window.
It helps if you name the image files, like "table" "shaft1" and "chalk" rather than leave them as DSC00017 as your system named them.
To upload an image file from your computer, click on the paper clip and a new, small window will appear. From a file browser drag the file onto the "Choose File" button, or click on that button to open a browser. Click "Upload" and the file will be uploaded and appear in the list to choose.
If you do not place files explicitly, they will just be lumped together at the end of the message.