How do I access a player's folder without using a local script?

What I'm trying to do is to get the information of the level value inside the player's folder, and use this value to increase the player's max health. This is all happening inside a normal script inside the starter character script. I tried to put an intvalue inside the replicated storage and to a local script to change this value into the player's level. But when I used this intvalue inside the starter character script, it returned nil.