'Your voice. Yes, find it. Don't ask me how. It's a discovery that's as mysterious as it sounds, but at some point you will suddenly realize that you are channelling an authentic part of you. And that's it. Magic.'
Step 1: Forget about it.
The default option for all writers is to disappear from your work entirely.
'Invisibility is a superpower.' Banksy.
This is a good place to start. It’s the only place to start. If you start with what you think is a voice, you're bound to make the mistake of being 'quirky' along with 99% of writers. Just check those Twitter profiles. It's a mistake we can all make. We all want to be 'different'. But that 'quirky' voice may well be derivative (favourite book, last book you read) and if it’s a faker's voice, you will alienate half your readers (and half the agents.) You can't afford to do that.
So start by going for prose like a window pane, as George Orwell put it.
If you do not progress from step...