Catholics don't believe in faith alone.
In fact, in the sixth session of the Council of Trent,
Catholics clearly labeled those who believe in faith alone
as heretics.
Specifically, Canon 14 says,
if anyone sayeth that man is truly absolved from his sins
and justified because that he assuredly believed himself
absolved and justified, or that no one is truly justified,
but he who believes himself justified,
and that by his faith alone,
absolution and justification are effected,
let him be anathema.
So in fact, not only do Catholics believe
in work salvation,
but they clearly label those who believe in faith alone
as heretics and cursed.
But the Bible does say very clearly in Ephesians 2, 8, and 9
for by grace are you saved through faith
and that not of yourselves.
It is the gift of God, not of works,
lest any man should boast.
You shouldn't be a Catholic.
You should believe the Bible.