New update for OpenWRT for bananapiW2

hi all . I am looking for new update for OpenWRT to work with banana-pi W2 router , I want to use this router ad Network VPN router . therefor I want to install OpenVPN and IPSec on OpenWRT but I can’t any one can help me how I can do that ? how I can install OpenWRT 18.X for BananaPi- W2