How do I make a picture fit on the Avatar. The little picture that shows up with post. I know how to adjust so the size and stuff so it will fit. Like other pictures have to be 800x600pixel dimension and image size 5X4 but how do I make it so it is 6 pixels?
Not sure what program you use to re-size things, but ..
In the "image size" dialog, search for a box where you can designate resolution. Sometimes there will be a "draft" or "low" quality option. Otherwise, select something like 32 DPI. Then re-size to 100x100PX.
If the file-size problem remains, try saving the file as a GIF instead of a JPEG--in most programs this is an option under "file type" in the "save as" window. In new(er) versions of Photoshop, you go to "save for web."
The lower resolution of a GIF means a much, much smaller file.
You will lose a bit of color info and detail; but avatars ain't artworks, so .. no harm there.
If that doesn't get you close enough (some high-resolution digital camera photos will still be 7 or 8k at 100x100PX), try it at 90x90PX.
And if that won't work .. it just wasn't meant to be. Find a new photo.