Need Help, new to MikroTik

Hello Everyone, i have MikroTik 450g router,at initial configuration i connected as WAN side PPPoE on eth1 and it was connected successful. I am on eth2 and as a DHCP client and got ip 192.168.88.254, subnet 255.255.255.0, gateway 192.168.88.1 and dns 192.168.88.1 but still i am not getting any internet .

Thank you
Santosh

Do you have a NAT Masquerade rule set?

add action=masquerade chain=srcnat out-interface=YOUR PPPOE CONNECTION