I cant connect my ISP provider username and password

hello guys,
i have hg553 i installed last version of openWrt
my problem that i cant find WAN interface to connect with my ISP PROVIDER username and password,
PLEASE can you help me to solve tgis problem?

The wan interface is right there in your photograph? Click edit and add your pppoe details?

yes i did it, but doesn't work, do you think i have to ask my provider to add my mac address to connect pppoe?

another question, can i use openwrt on hg553 with adsl cable, to be the only modem??

Watch the log, it is likely to tell you why it’s being rejected through pppoe errors.

I doubt the modem part of your router is supported by openwrt, only lantiq modems are