This is how to redirect a Blogger post to another URL:
REMINDER: Before doing this. Always back up your Blogger Template.
1. Login to your blogger dashboard--> layout- -> Edit HTML
2. Search for <head> tag. You can do this by using CTRL+F function.
3. Copy below code and paste it just after the <head> tag.
<b:if cond='data:blog.url == "BLOG-POST-URL"'> <meta http-equiv="refresh" content="5; url=REDIRECT-URL" /> </b:if>
4. Replace BLOG-POST-URL from your own link and REDIRECT-URL to where you are redirecting your link.
To redirect without waiting replace, content="5; with 0, or what you think is best.
5. Now save your template.