OpenVPN Access Speed & Internet

[slkamath]

Hi,
I have recently installed OpenVPN in our premises via pfSense. I have few queries & need guidance from all of you.

1. While accessing OepnVPN file server, Internet should not work (Internet works through VPN not from their home network).
2. While accessing File Server it is taking more than 1 min to access each folder. How to make this fast?
3. Also how to put all the LAN systems inside VPN?

Thanks in advance.
Lokesh Kamath