Redirect all blog links from WordPress.com site to new domain

I’m trying to work on redirecting all the blog links from https://example-source.wordpress.com to https://example-target.com/blog/. The source is a free wordpress.com site while the destination is our own domain. It’s easy if it’s not a wordpress.com site since I only need to install a redirect plugin or change something in .htaccess but we need to upgrade to a business plan and I have no way of accessing the files.

Any other options to consider to get this done? Any help is highly appreciated.

You could use Site Redirect from WordPress.com (https://en.support.wordpress.com/site-redirect/) to achieve this. While this is a paid for service, it is relatively cheap and you will likely only need to pay once.

Nice site, and as redirects are essential for SEO, it is well worth the effort and small cost to get this right.