lan to wan

Hi I have OPPO 5G CPE T1a router which has really basic network options and only two lan ports. I want to buy another router which I wanna use for vlan setup and network monitoring for example TP-Link ER605. Oppo doesnt have bridge mode, how do I connect them to work properly?

Hello, my pc is restarting on windows logo, i tried to format hard disk install new windows, its happens again. I tried hard disk from my friend with windows working on his pc, it restarts again. I cleaned it and its restarting again. I replaced ram, i tried everything but it is restarting...