How to migrate from Blogger to self-hosted Wordpress while keeping all SEO intact? Is it possible?

I've seen this plugin https://wordpress.org/plugins/blogger-to-wordpress-redirection/#description

However im not exactly sure about it. Here's what they say:

• Supports rel=canonical, meta-refresh tags on Blogger.com which will speed-up redirection

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If I remember correctly, meta-refresh is the kind of refresh that was used either by developers who didnt care about SEO, or by people who tried to "hide" a redirect from search engines.
Whereas proper SEO redirect is the 301 redirect.
Am I right or wrong?

Also will blogger even allow me to redirect, or will they ban my website the moment they realize it?

Banjuo said:

If I remember correctly, meta-refresh is the kind of refresh that was used either by developers who didnt care about SEO, or by people who tried to "hide" a redirect from search engines.
Whereas proper SEO redirect is the 301 redirect.
Am I right or wrong?

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as far as I know, meta refresh simply refreshes the page (useful for pulling status change / latest news-type of content), it doesn't redirect the URL of the page (so, the page) to another page. And if that's (still) the case, then meta-refresh and 301 redirections are 2 completely different things

Banjuo said:

Also will blogger even allow me to redirect, or will they ban my website the moment they realize it?

Click to expand...

blogger does allow redirections, but (and with regards to the question in the title) I'm not sure how useful these redirects are for keeping your rankings intact. They might still work, but like I said, I am not 100% confident that they will since I've never had to deal with blogger -> wordpress migration / redirection. So, you'll probably want to check some Youtube tutorials on how to do this... or wait for someone else's answer