Output: Requested fix: Move random land generation down, and zoom out to view the WHOLE island. Help indicated via arrow on what im trying to do. Output wanted:

Help with Python Turtle: Need help finalizing turtle drawing and to be fixed. I've included an picture to show what I need for the code to resemble.
1. Lowering top circles to the middle of the canvas to be able to view the WHOLE island.
2. The possibilities of the circles being more irregular when generating.
3. Rivers being bold/thick and cutting through the island on a diagonal. 

Previous question: https://www.bartleby.com/questions-and-answers/help-with-python-turtle-struggling-with-last-few-steps-to-complete-what-i-want-the-following-1.-make/41857550-b5f1-46eb-95e1-dc46d2033b37 

The code:

import turtle
import random
import tkinter as tk
from tkinter import simpledialog
from PIL import Image

# Define colors
ocean = "#000066"
sand = "#ffff66"
grass = "#00cc00"
lake = "#0066ff"
mountain_color = "#808080"  # Gray color for mountains

# Store mountain positions
mountain_positions = []

def draw_irregular_circle(radius, line_color, fill_color, irregularity=10, spikeyness=0.2):
    my_turtle.color(line_color)
    my_turtle.fillcolor(fill_color)
    my_turtle.begin_fill()
    angle = 0
    while angle < 360:
        angle += random.uniform(10, 60)
        if angle > 360:
            angle = 360
        actual_radius = radius + random.uniform(irregularity * spikeyness, irregularity) * random.choice([-1, 1])
        my_turtle.circle(actual_radius, angle - my_turtle.heading())
    my_turtle.end_fill()

def draw_triangle(size, line_color, fill_color):
    my_turtle.color(line_color)
    my_turtle.fillcolor(fill_color)
    my_turtle.begin_fill()
    for _ in range(3):
        my_turtle.forward(size)
        my_turtle.left(120)
    my_turtle.end_fill()

def move_turtle(x, y):
    my_turtle.penup()
    my_turtle.goto(x, y)
    my_turtle.pendown()

def draw_lake():
    x = random.randint(-200, 200)
    y = random.randint(-150, 200)
    move_turtle(x, y)
    draw_irregular_circle(60, lake, lake, 10, 0.3)  # Increased radius and irregularity

def draw_mountain():
    x = random.randint(-200, 200)
    y = random.randint(-150, 200)
    mountain_positions.append((x, y))

def draw_river():
    y = random.randint(-150, 200)
    move_turtle(-300, y)
    my_turtle.setheading(0)
    my_turtle.color(ocean)
    my_turtle.pendown()
    my_turtle.forward(600)
    my_turtle.penup()

def get_user_input():
    root = tk.Tk()
    root.withdraw()
    user_input = simpledialog.askstring("Input", "Enter the number of lakes, mountains, and rivers separated by commas (e.g., 3,2,1):")
    num_lakes, num_mountains, num_rivers = map(int, user_input.split(','))
    root.destroy()
    return num_lakes, num_mountains, num_rivers

# Get user input for number of lakes, mountains, and rivers
num_lakes, num_mountains, num_rivers = get_user_input()

# Initialize screen and turtle
screen = turtle.Screen()
screen.setup(width=1200, height=800)  # Increase the size of the window
screen.bgcolor(ocean)
screen.title("Island Generator")
my_turtle = turtle.Turtle()
my_turtle.pensize(4)
my_turtle.shape("circle")

# Draw the sand and grass areas with irregular borders
draw_irregular_circle(450, sand, sand, 30, 0.4)  # Increased size
move_turtle(0, 120)
draw_irregular_circle(360, grass, grass, 25, 0.4)  # Increased size

# Draw lakes, mountains, and rivers
for _ in range(num_lakes):
    draw_lake()
for _ in range(num_mountains):
    draw_mountain()
for pos in mountain_positions:
    move_turtle(pos[0], pos[1])
    draw_triangle(135, mountain_color, mountain_color)  # Increased size
for _ in range(num_rivers):
    draw_river()

# Save the final result as an image
canvas = screen.getcanvas()
canvas.postscript(file="island.ps")  # Save the postscript file
img = Image.open("island.ps")
img.save("island.png", "png")  # Convert to PNG

turtle.done()