Thanks for the reply, I think this is exactly what I needed to hear; will try to reflect on this.
From the very top of my head: I know exactly what I need to do but I feel like with every tech choice I need to either learn "how" or refresh my previous knowledge.
Wearing multiple hats in rapidly popping up and fading out tech startups didn't really help to go deep with one thing (as I managed to with objc/ios)