If you can afford the time, this resource is a good one (Free). https://cs193p.sites.stanford.edu/2023 (The videos are available on YouTube in their official channel). You can skip through the basics (The ones related with printing 'Hello World', etc).

There's also this course on Udacity (https://www.udacity.com/course/ios-developer-nanodegree--nd0...), in which you are exposed to some APIs (To use them) almost to the end (Since you have mentioned being interested in the networking capabilities available).

Hope that helps!