There's no substitute for carrying your stuff and using it. You'll learn a LOT :-)

When I cut down my backpacking load from 48# to 33# the world changed for me for the better.

Frequent practice with your stuff also reduces the mental overhead load - that dread of "having to- " set up camp, light the stove, boil the water, etc These are things that start out being a big deal when you do them the first time but fade to unnoticeable effort with familiarity.

I also strongly suggest a good hiking stick/trekking pole. Mine has saved me from falls many times over the years just having something to stick out there for balance.