|Also let me know if there is any other simpler way without routing and remote access..?|
The easier way would be to buy a SOHO router. Plug your internet connection the routers WAN port. Ensure the router is configured properly and connecting correctly to the internet.
Then, get a switch and plug that into a LAN port on the router. Plug all your clients and server(s) into the switch. Configure the DHCP scope on your switch and ensure all clients are set to DHCP. Give your server(s) a static IP that is outside the scope of your DHCP server and apply the appropriate subnet mask, gateway etc to it and all should be able to connect to the internet without using RRAS/NAT on the server.