Booking/planning trip

Hey guys, I’m traveling to Japan for the first time with my family(parents, sister) end of March-April this year for 12 days. Needed some advice on how to plan where/how long to stay, hotel recommendations, train tickets, along with recommendations for places to go to. Was thinking of going to Kyoto vs Osaka first and staying for a few days before coming back to Tokyo since our flight is arriving/leaving at Haneda. Thanks in advance for the suggestions/advice

by kingkhan93