So:
1) Yes, once you've watched at least 2 hours you're now in the pool of eligible viewers. You get a higher chance the more you've watched, but there are diminishing returns, i.e. your 37th hour doesn't increase your chances anywhere near as much as your 3rd hour (the relative increase in your total hours is much lower).
2) You do not have to be actively watching. Once you've watched at least 2 hours, every time we give out access we just take the pool of all eligible viewers and randomly choose people (weighted by total view hours), regardless of if they're currently viewing. Please look after yourself and make sure you eat! ;)
Good luck to you, I hope you get access soon! We're actively working to try and increase our server capacity, but we also need to ramp at a responsible pace so that we're testing load as we go.