Use Google Search Console to track your website. Google recommends logging in about once a month to see if there are any surprising errors or dips in traffic. This site also provides a variety of indexing-related tools. For example, you can confirm that Google can access your pages ("Fetch as Google"), notify Google of a domain change ("Change of Address"), and issue urgent blocks on content you need to take off your site ("Remove URLs").
Most often, you’ll want to use the noindex tag. You usually only want to use nofollow for affiliate links, links someone has paid you to create, or you receive a commission from. This is because you don’t want to “sell links”. When you add nofollow, it tells Google not to pass on your domain authority to those sources. Essentially, it keeps the web free of corruption when it comes to linking.