Question about MikroTik RB4011iGS+5HacQ2HnD-IN

Technically, yes, but with limitations. You can buy a compatible 10 Gbit/s SFP+ module for the fibre network and use it with that. However, the remaining Ethernet ports are only 1 Gbit/s capable.

Unfortunately not, it is not a modem. It manages WLAN, LAN and has an integrated firewall. I wouldn't recommend it for beginners either.