To change what kind of file it is (say from bmp to jpeg) click on File, go to Save As.
At the bottom of the dialogue box is your file name, and below that another line that's titled "Save As Type."
There's a drop down menu on the right of that box. Click on the drop down, and scroll down to the type you want to save it as. Lots of choices, as you'll see.
Can't help you with your pic looking worse. I could guess, but I hate making a complete fool of myself in public.
It has been said that man is a rational animal. All my life I have been searching for evidence which could support this.
-- Bertrand Russell
To make an apple pie from scratch,
you must first invent the universe.
-- Carl Sagan