Hello, Natalia. 

Yes, it is perfectly possible to setup UNA as a dating site, especially with the new “custom search” feature which allows creation of search forms by custom profile fields. 

Tongetbstarted in general it is a good idea to read articles here:

https://una.io/page/articles-home 

And documentation here - https://github.com/unaio/una/wiki

you can host it yourself or use our cloud hosting - 

https://una.io/page/hosting (Note the video tutorial for starting up)

Hope this helps