This is precisely what I recommend in my "how to learn cryptography as a programmer" post.

https://soatok.blog/2020/06/10/how-to-learn-cryptography-as-...

Start with the highest-level, hard-to-get-wrong abstraction. If you stop learning there, you're safe!

Then drill down as you be come more of an expert. Libsodium is step 2 from something fit-for-purpose.