2 wire light install – have I bought the wrong Shelly?

Bit confused with this light switch, I was expecting more wires, but instead I've only got two

Black L, brown N, so I can get the Shelly to power up OK.

I can also get the Shelly to recognise the switch input, as wired in the attached photo.

I'm having a mental struggle trying to figure out how to close the loop with the relay (so that the lights work).

Thanks, D

Update ... possibly figured it out ... install the Shelly here, instead of at the switch. The two wires from the switch connect to L and SW on the Shelly, then figure out the rest

Many thanks for the fast replies @66er and @thgoebel – much appreciated.