As no one shared their landing page, just made a quick one using a few of the various blocks: https://www.sosinvision.com.br/
The usage is pretty simple:
1 - Choose a block among the option you have (more apps, more blocks):
2 - Configure each block according to their settings. The following example is for the Topics block:
It's done.
You can also reorder the blocks:
Then you just need to set Landing Page as default app:
Btw, you can choose which user groups will be able to view each topic. Still, it checks the content for the block. I mean, if you choose MEMBERS block and you set Guests to not view profiles, then the Members block will not show up to guests.