Sleep advice

So I made a post the other day about my baby going into his own room, it hasn’t gone too well 😂

He does amazing for the first couple hours and then he will wake up crying on and off every 15 minutes and won’t settle into a deep sleep again

So I am thinking of putting him to sleep tonight in his cot but having him laying in his bassinet just so he gets familiar with being in a complete separate room to me while still having the comfort of his bassinet which he is used to, would you say this is a good idea? Once he’s used to that I will remove the bassinet completely

I also plan to have one of my shirts placed under the mattress to see if that helps him, in the hopes that we can actually have a successful night of him staying in his own room 😂

Has anyone else found a good way to deal with this?