A simple search:
http://forum.mikrotik.com/t/forward-all-traffic-on-local-device-to-vpn-connection/151728/1
http://forum.mikrotik.com/t/route-all-and-or-specific-traffic-to-a-vpn/127919/1
http://forum.mikrotik.com/t/wireguard-vpn-route-all-your-traffic-through-vpn-tunnel/162002/1
And you can “purchase” lots of VPN providers:
https://letmegooglethat.com/?q=vpn+providers