"I don't do computers"
OK, I'm interested...kinda...what is taught in Computer Science?
This is often the one thing that puts people off learning to teach Computer Science. The thing is, up to GCSE level, coding is not that difficult and coding up to Key Stage 3 is not beyond anyone.
Learning to code is like learning a modern foreign language. It takes time and practice. Depending upon the amount of time you can set aside to learn, you could be confident enough to teach coding at Key Stage 3 within 6 weeks.