When posting, please check the appropriate category under "acaramba.com" on the right side of the screen (in addition to the category you want to use in your own blog) so that your post also appears on the main block page.
(This is a bit tricky... but you'll get the hang of it. Or not. Or yes. Yes.)
1. Go to acaramba.com/cpanel
username: acaramba
password: you know what it is
2. Find File Manager > Home > public_html > skins > (whatever skin you're using; Yen, so you've changed yours to "natural_pink"; look for that folder);
Note: You will find these on the left-hand portion of the page. Click on the plus signs to expand the folders.
3. On the right side of the screen, you will find the contents of your skin's folder. Check the box beside "style.css" and then click on the pencil ("Edit") icon on the top part of the page;
A.
For a single, biggish image:
1. When you're already at the "Write" page in acaramba.com/admin.php (look for the link on the topmost part of the page), find the "Files" button at the bottom of the main textbox; it brings up a new, smaller window;
2. Click "Upload" and "Choose a file"; choose a file;
3. Click "Upload to server now" (this will bring you back to the previous page which should now show the image you uploaded);