So you are taking another shot at getting monetized now?
Had a quick look at what is needed on Google:
Watch hours: Have at least 3,000 watch hours in the past 12 months
Subscribers: Have at least 500 subscribers
Uploads: Have at least 3 uploads in the past 90 days
Adherence to policies: Follow YouTube's community guidelines and terms of service
Location: Live in a country where the YouTube Partner Program is available
AdSense account: Have a linked Google AdSense account to receive your earnings