Expert Guidance for eVisa Application

I need assistance navigating the eVisa application process. Specifically, I am struggling to understand the application instructions and would appreciate clear guidance to ensure my application is accurate and complete. Ideal expertise includes familiarity with immigration processes, experience with eVisa applications, and the ability to provide clear, concise explanations. I am a New Zealander and have been living in the Uk for nearly 40 years using a wet stamp "indefinite leave to enter the UK" It has worked well but I think I now need to apply for an eVisa. I'm 50% through this process but now going around in a circle!