I tried installing the Electrum wallet, but it never earned a profit.
Electrum isn't Bitcoin or LN node software.
Lightning Network is different, it is a second layer built on top of Bitcoin and since there is no mining there, we have a teeny tiny fee paid to LN nodes that relay the transactions. It is not big enough to be called "profit" in my opinion.
It doesn't even cover electricity cost and LN wallet usually would choose route with lowest total relay fee.