Help with my Mod Code to place Furniture

Hello Community,
i did mod for Max Payne 2 in the past, but im new with Stardew Valley.
i tought i might use ChatGPT to write me a quick code for the beginning
but unfortunaly i run into some Errors, and i cant find a Documentation anywhere about all the Functions etc and how to use em.
I wanted to make a small Mod that lets me place a Chair with a Keypress and then be able to recover Energy while sitting, and removing the Chair when i stand up afterwards.
Maybe someone can guide me into the correct Direction on how to fix, and maybe find a good Documentation about all the Functions.

Code:

using System;
using System.Collections.Generic;
using StardewModdingAPI;
using StardewModdingAPI.Events;
using StardewValley;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using StardewValley.Objects;
using Rectangle = Microsoft.Xna.Framework.Rectangle;
namespace ChairMod
{
    internal sealed class ModEntry : Mod
    {
        private bool chairPlaced = false;
        private Vector2 chairPosition;
        private Furniture chair;

        public override void Entry(IModHelper helper)
        {
            helper.Events.Input.ButtonPressed += OnButtonPressed;
            helper.Events.GameLoop.UpdateTicking += OnUpdateTicking;
            helper.Events.GameLoop.DayStarted += OnDayStarted;
        }

        private void OnButtonPressed(object? sender, ButtonPressedEventArgs e)
        {
            if (!Context.IsPlayerFree || Game1.activeClickableMenu != null) return;

            if (e.Button == SButton.C) // Ändere diese Taste nach Bedarf
            {
                PlaceChair();
            }
        }

        private void PlaceChair()
        {
            if (!chairPlaced)
            {
                chairPosition = Game1.player.getStandingPosition();
                Vector2 vector2 = chairPosition * Game1.tileSize;
                chair = new Furniture(Furniture.chair, 1467); // 1467 ist die ID des Stuhls (kannst du anpassen)
                Game1.currentLocation.Objects.Add(chairPosition, chair);
                chairPlaced = true;
            }
        }

        private void OnUpdateTicking(object? sender, UpdateTickingEventArgs e)
        {
            if (!Context.IsPlayerFree || Game1.activeClickableMenu != null) return;

            if (chairPlaced && Game1.player.GetBoundingBox().Intersects(new Rectangle((int)chairPosition.X, (int)chairPosition.Y, Game1.tileSize, Game1.tileSize)))
            {
                Game1.player.Stamina = Math.Min(Game1.player.MaxStamina, Game1.player.Stamina + 5); // Ändere diesen Wert, um die Energieaufladerate anzupassen
            }
        }

        private void OnDayStarted(object? sender, DayStartedEventArgs e)
        {
            if (chairPlaced)
            {
                Game1.currentLocation.Objects.Remove(chairPosition);
                chairPlaced = false;
            }
        }
    }
}