1. PLEASE don't use neon fonts unless it's manipulated darkish kinda a cover.
But here, it looks fine:
2. Be careful with calligraphy fonts. Many look very sad, basic and empty.
And honestly they hardly ever look good on covers, avoid using basic calligraphy fonts like these:
Don't get me wrong, not all script fonts are bad, I just find the above examples to be extremely overused.
Check out the script font packs that I've posted in this book. You can find it under the 'Apps and Resources' section towards the beginning.
3. Metal text
Follow my tutorial on how to do this.
4. Don't use fonts that are difficult to see and plain ugly, such as:
You may think that these match your apocalypse or horror story pErFeCtLy 😍
NO THEY DONT