How do you put baby to sleep in bassinet?

My second baby is 7 weeks old and I rock him to sleep every naptime and transfer him to his bassinet after he's been asleep for a while, with very mixed success.

We did this with or first baby and ended up with a giant 2 year old who wanted to be rocked to sleep. My 2nd is 99.6th percentile and honestly I just can't again!

I hear people saying that they put their babies to sleep in their bassinets, but like, how? I know this probably sounds so stupid but what are you doing? My son just cries if I put him down when he wants to go to sleep. Any advice would be great!