Newsfeed + Registration form

Hi Everyone,

I am building a website for a sporting club and now I would need some help.
We need a registration form for new members that would like to register for the club. How could that be done within RW8?

Moreover we are looking for a Newsfeed in the website (are there any recommendations for that)? And how can that be a secured space on the website so that just few people can login and post news + Pictures on the website? Is that somehow possible?

My last question would be regarding a calendar for the website. like if there are any planned events that can be shown in the calendar, is there a stack that can be used for that?

Thanks in advance!