First, it is (at least currently) very slow. Second, there appear to be limits on how often you can use the tool, although these limits vary from site to site. Unfortunately, GSC does not have a bulk option. For any large-scale changes, you will have to rely primarily on updating your XML sitemap.
Precautions
One final note though - the big difference between theory and practice in these cases is that real sites often have mixed signals. If you do a 301 reverse targeting, you are already sending mixed signals in a sense (compared to your past signals). If in addition to this change you have internal link mismatches or bad canonical tags, or outdated XML sitemaps or redirect chains that are too long and broken to always go back to the same page, all of this will be a higher risk and take longer. Make sure all of your new signals are consistent before you flip the switch.
Final warning - don't panic and do any of this because rankings brazil mobile database or traffic aren't going the way you hoped a few hours or even days later. Major reversals, especially site-wide or domain changes, can easily compound the problem. Think it through and make sure you're fixing the right issues.
Summarize
Go ahead and learn everything you need to know about using 301 redirects.
While they seem like a simple theme, there is more to them than many people think, especially when you consider not only the different usage scenarios but also the different ways they must be implemented depending on your site setup.
Understanding 301 redirects is an important part of any SEO knowledge, but by taking the time to review and double-check the way you use them, you’ll be able to avoid mistakes and use them in the right situations.