"I don't wanna start" - I set a specific time that I will write/edit/revise each day, and stick to it. I also stick either a time period (writing) or a word goal (writing and editing). No excuses, I just do.
"I don't know where to go" - I write anyway. Anything that feels outright wrong will be like pulling teeth and I'll delete and try a different angle. Anything else is the right direction to go in.
"I have no idea what I want to do next" - Sorry, I can't help you here. I'm overflowing with ideas, and it's a curse.