How did Steve Jobs thrive in a technical field with a non-technical background?
quora.com
quora.com
He wasn't as talented as Woz or Bill Gates at engineering but I don't know how you can call him "not technical".
Fun fact: That was BillG's favourite put down if he thought you didn't know what you were talking about, "I guess your just not very technical".
Additionally, Apple is and has been a consumer company, so understanding the nitty gritty technical details is not the core concern. Instead, building a premium brand, with a cult like following, and being able to identify market opportunities was his genius.