Ok .. I can help you by giving the full script for your online dating service, mobile app, or whatever thing you are looking for. And if you want to design or develop mobile application or windows application or web service I can write the how should the application work.
As you suggest ,yes, the first interface can be designed as welcome page and content which include in the page. Next you can give signup for for girls and boys and other form. In this case we can know about their nature, By asking some questions. Then we can get some ideas about user .After that we can divide again all enrolled users in to 3 sub catogories, After that we can introduce the others which they are looking.
For shy people we can help by giving some relationship advice ,Then you can start youtube channel also,,
I can give full idea about these things, very clearly. so far i have given many ideas for you. If you want many details Inbox me.. But i am not Native English speaker . But i am engineering student. so you can work with me very easily. Inbox me.