You can definitely save yourself a lot of time and effort by using a plugin to change the nofollow links to dofollow links in WordPress. One popular plugin that can help you with this is called "Ultimate Nofollow".
After installing and activating the plugin, you can go to your WordPress dashboard, navigate to the post where you want to change the links, and then simply edit the post. Within the post editor, you'll see the option to toggle between nofollow and dofollow for each link.
Alternatively, if you're comfortable with coding and prefer a more hands-on approach, you can use a command to search and replace the nofollow attributes within your posts. However, this method requires some technical knowledge and might be riskier if not done correctly.
But for most users, the plugin route is the quickest and safest way to make these changes across your site.