How to setup apex and www on Netlify, but other subdomains on Linode?

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You could do either option A (delegate DNS to Netlify) or option B (configure external DNS.)

Try reading this support guide which provides an overview of the reasons/benefits for each

[Support Guide] Should I use Netlify to manage my DNS?

Last reviewed by Netlify Support in Aug 2023 You have the option to manage your DNS at Netlify or somewhere else, and either way will work great! You can still use Netlify to build your awesome site, and leave DNS management where it is. Or Netlify can manage your DNS for free (!) and we are happy to provide this service because we know it makes people’s lives a lot easier. I can share one of the benefits of Netlify’s DNS and one of the benefits of external DNS to help you decide. Netlify D…

Based on your setup, I would suggest leaving DNS with the registrar and using external DNS configuration for Netlify as it requires configuring only two records rather than replicating all DNS records.