To disable bloatware apps is a good idea because it will free space on app storage

and saving processor power and therefore battery power.
But you won't see any effect on RAM usage like more free RAM.
And you don't need to worry about RAM usage

A process not running, just remaining static in RAM doesn't use processor power, that's why it doesn't consumed battery.
Android tries to hold processes in RAM, as many as possible, in case their apps would be started again. That's saving processor power and therefore battery power.
Android's efficient process management will automatically close unused processes when it needs to in order to optimize RAM usage.
"Not used RAM is useless RAM".