@grievas : uploading pictures into the post is really quite simple. Keep uploading your pictures to an image hosting site, but instead of copying the image copy the direct URL i.e. a link that will take you directly to the picture and not the hosting site. Then when you are typing your post and want to add your picture click on the rightmost button on the bar at the top. The button that looks like a picture of mountains with the sun. Then paste your URL where it says Source and click ok, and your picture will appear as part of the post. By dong it this way you can also change the size of the picture in the post.
Hope this helps!