I've just had this problem - and still have really!
I don't have a 'browse' button, and spent a hell of a long time looking for it!
I took advice off a post some time ago (look on the 'fish photos' section and read some of the posts there).
Suggest you register for: www.photobucket.com
I've just done this, and transferred my photos from my PC to here - it is then easy to transfer (using the http button) the photo. Remember to resize your photos first - I've just put a photo of my common pleco on the Buy/Sell section, and he is life-size!
Bit too big - gives you nightmares to look at him!
I also am not very technical, but this was OK to use..... Hope you get on OK...