  Let $G$ be a real Lie group, $\Lambda\leq G$ a lattice, and
$\Omega=G/\Lambda$. We study the equidistribution properties of the left random
walk on $\Omega$ induced by a probability measure $\mu$ on $G$. It is assumed
that $\mu$ has a finite first moment, and that the Zariski closure of the group
generated by the support of $\mu$ in the adjoint representation is semisimple
without compact factors. We show that for every starting point $x\in \Omega$,
the $\mu$-walk with origin $x$ has no escape of mass, and equidistributes in
Ces\`aro averages toward some homogeneous measure. This extends several
fundamental results due to Benoist-Quint and Eskin-Margulis for walks with
finite exponential moment.
