Hi Jojo, welcome to the site.
There are a few ways of posting a pic, aas a complete technophobe, I use the easy way, if you click on post reply then across the tool bar 3 in from the right is a square icon. Click on this and select from computer (assuming the pic you want to post is on your computer) click select files and browse to find the pic, click open on your folder and ot will transfer into the box on screen, click upload files and there you are done, you can add more then one pic, just select which you want, wait for screen to show them and then click upload files.
Hope that makes sense,
Sue