Beginners Problem. Setup Question for public hotspot. RB2011UiAS-2HnD-IN 120

RouterOS Beginner Basics
1

A big Hello to everyone!

To keep it in short, I just bought my first routerboard device. A RB2011UiAS-2HnD-IN. I also purchased a Mikrotik Groove 2Hn Groove 2Hn and a Draytek Vigor Modem.

The purpose is to be used in my cafeteria as a hotspot. I want to provide to my customers free wifi with limited bandwidth only for the basics (facebook, chatting, web surfing, e.t.c., no downloads or heavy streaming). The maximum connections-devices won’t be more than a 100.

The modem is plugged to ETH1(IP 192.168.1.1). In ETH2 is plugged an Mikrotik Groove 2Hn Groove 2Hn, because I want to create a separate wifi network for coworkers and 2 printers (they don’t have LAN ports, only wifi connection). If the signal won’t be enough I will add an extra Mikrotik Groove 2Hn Groove 2Hn for the hotspot.

Until now I’ve made a “typical” setup through WebFig (I do not have console experience). I’ve plugged 4 devices for testing purposes at ETH6-ETH8 and everything works great.

The problem is that I cannot figure out how to make the setup to work! More specific:

1.When I plug the Draytek Vigor Modem after a wily internet crash. Any suggestions?
2.How to configure the router’s wifi (hotspot use) connections from the router wifi to work as an independent network? I will set only one password, same for everyone who want to use the hotspot.
3.How to block the devices on that network so cannot discover each other?
4. How can I make an independent network for the Mikrotik Groove with different password (but I want to this VLAN each device being able to find each other)?
5. If the router’s signal isn’t enough and I will need to add a second Mikrotik Groove to cover the rest area, will I be able to set it up as a repeater of my router wifi network to the same VLAN? And if yes, how?

I would like to thank you for any help in advanced!
Yours,
Unleashed82

2

Let us try to clarify:
Your WAN port is ETH1 on Mtik?
Check for log on mikrotik, it should have some info about link problems if they occur. Post them here.
Use Winbox for managing your Mikrotik devices, more convenient, easy to use and user friendly GUI.
Set hotspot server with network segment that you want, assign profiles with bandwith that youll let for your users, set user and pass for that profile (optional). Mikrotik will create firewall rules and queues for users automatically.
You can add couple of firewall rules to drop invalid connections. Use IP/Hotspot/servers to accomplish adding server to your interface, then add server profile and user profiles.
3. If you want to block users from one segment to reach other segment, simply add firewall rules that will block packets from specific segment to another. IP/Firewall and create a rule.
4. Specify what you want. Simply add address for that interface and you have a independent network, as you say. You have to assign DHCP server for that interface to give IP addresses to clients.