I followed a tutorial for level loading, but cant figure out how to load the next level using area2d

[wheat stump]

Its not that I cant send a signal to player from area2d. I dont know how to load the next level

here is the code

class_name Level
extends Node

@export var level_id : int
@export var level_start_pos : Node2D

var level_data : LevelData

func _ready():
    level_data = LevelManager.get_level_data_by_id(level_id)

class_name LevelData
extends Resource

@export var level_id : int
@export var level_name : String
@export var level_completed : bool
@export var level_unlocked : bool
@export var level_path : String