Connection between customer and CE router(L3VPN)

Hello,
as I’m totally new to routing, can anyone explain to me, how to make a connection between my mikrotik and CE router, if the provider gave me LAN subnet on my side 192.168.x.x/? and his WAN 10.10.x.x/?, bearing in mind that I need to have further communication with my office subnet 172.16.x.x/?