That's good, but I suggest that you'd download GIMP and get the G'MIC filters.
Have the dimensions be from 400x200 to about 500x200, you don't want to stretch the page.
Download textures, psds, pngs, and more at tumblr, or deviantArt. It'll help bring in more details and it also gives you the opportunity to experiment after you get used to using it.
I'd suggest you'd search up some tutorials, as it'll help you improve.
Download some fonts, you can find some font packs with some commercial fonts that the person whoever made the font pack found a free download of.
When you get Gimp, I'd suggest you use fuzzy brush (19) at about 22 pixels, be sure to zoom in at 400% so the picture you'll use will be blended in PERFECTLY.
And my job here is done.
Oh and NO cut-off pictures, it's a huge no no in the graphics community,