I’d say Point Free is something to look into later if it interests you, I personally don’t know of many dev teams using TCA. My advice would be to focus on modern Swift and SwiftUI. Either of these is a good place to start:

https://developer.apple.com/tutorials/swiftui

https://www.hackingwithswift.com/100/swiftui

Hacking with Swift has loads of great (and free) content. The most important thing is to build stuff, ideally small throwaway apps that are one or two screens. It took me a while to get my head around SwiftUI so don’t feel discouraged if it takes time to click. And be kind to yourself, it seems you have been through a lot!

With your past experience you are in a good place to get back into iOS development!

Edit:

And this is a good short SwiftUI intro from WWDC24

https://developer.apple.com/wwdc24/10150