Hello, young initiate.
First thing first: Head to Discord, effectively immediately. It is only place to receive the news and updates directly from devs. Plus, community is awesome) There should be a link in the game page.
This topics might answer some newbie questions:
http://harem-battle.club/flower-knig...uide-tips.html
http://harem-battle.club/flower-knig...xperience.html

Enjoy you waifu collection, cherish what you get and never give up hope! XD