its not ideal, greater chance of cot death.
but sometimes it has to be done if baby won't sleep at all.
be careful with duvet being able to cover the baby's face, or possibility of you rolling over onto baby. strat egically placed pillows can help stop rolling over issues.
My daughter never slept in the Moses basket. If you've got room, try putting the cot next to your bed. Take the side off as well if you can.once the little.one gets into the swing of sleeping, you can put the side on the cot and then slowly move it away from the bed. It will take time. There is no "right" answer, do what you have to do to stay sane.
If you think.about it, what other mammal has babies and then says..."right - you can kip in that other tree over there?"
In terms of increasing chance.of cot death.... meh, this gets thrown around with kids.... increased risk of, more likely to. IMO noone ever puts a % on it. If the risk is a 0.5% increase, yes its "riskier" but you'd probably still do it.