Beginner need help fixing a currency tracker

I'm a beginner, i just started programming and im trying to make a currency app, and its not working. What is the problem, and how do i fix it and make it work? im also new to stackoverflow so bare with me. im trying to make a first page with frame1 where you have 3 options/buttons to press where each button takes you to a new page.

import tkinter as tk
from requests import get
from pprint import PrettyPrinter

printer = PrettyPrinter()

def get_currencies():
    endpoint = f"api/v7/currencies?apiKey={APY_KEY}"
    url = BASE_URL + endpoint
    data = get(url).json()['results']
    data = list(data.items())
    data.sort()

    return data
    
def list_currencies(currencies):
    for name, currency in currencies:
        name = currency['currencyName']
        _id = currency['id']
        symbol = currency.get('currencySymbol', '')

        print(f"{_id} - {name} - {symbol}")

def exchange_rate(currency1, currency2):
    endpoint = f"api/v7/convert?q={currency1}_{currency2}&compact=ultra&apiKey={APY_KEY}"
    url = BASE_URL + endpoint
    response = get(url)
    data = response.json()

    if len(data) == 0:
        print('Invalid currency')
        return
    rate = list(data.values())[0]
    print(f"1:{currency1} = {rate}:{currency2}")

    return rate

def convert(currency1, currency2, amount):
    rate = exchange_rate(currency1, currency2)
    if rate is None:
        return
    
    try:
        amount = float(amount)
    except:
        print('Invalid amount! ')
        return

    conv_amount = rate * amount
    print(f"{amount}{currency1} = {conv_amount}{currency2}")

root = tk.Tk()

root.title('The currency converter!')
root.geometry('400x500')

def frame2():
    frame2 = tk.Frame(root)
    frame2.pack()

    lable = tk.Label(frame2, text='Here you can compare values of diffrent cirrencies')
    lable.pack()
   
    text = tk.Text(frame2)
    text.insert(tk.END,'Write in the ticker of the first currency')
    text.pack()
    currency1 = tk.Entry(frame2,)
    currency1.grid(row=0, column=0, sticky= tk.W +tk.E)

    text = tk.Text(frame2)
    text.insert(tk.END,'Write in the ticker of the second currency')
    text.pack()
    currency2 = tk.Entry(frame2,)
    currency2.grid(row=1, column=0, sticky= tk.W +tk.E)
    
    response = tk.Text(frame3)
    response.insert(exchange_rate(currency1,currency2))
    response.pack()
    exchange_rate(currency1,currency2)

def frame3():
    frame3 = tk.Frame(root)
    frame3.pack()

    lable = tk.Label(frame3, text='Here you can convert values of diffrent currencies')
    lable.pack()

    text = tk.Text(frame3)
    text.insert(tk.END,'Write in the ticker of the first currency')
    text.pack()
    currency1 = tk.Entry(frame3,)
    currency1.grid(row=0, column=0, sticky= tk.W +tk.E)

    text = tk.Text(frame3)
    text.insert(tk.END,'Write in the amount yhat you would like to convert')
    text.pack()
    amount = tk.Entry(frame3,)
    amount.grid(row=1, column=0, sticky= tk.W +tk.E)

    text = tk.Text(frame3)
    text.insert(tk.END,'Write in the ticker of the second currency')
    text.pack()
    currency2 = tk.Entry(frame3,)
    currency2.grid(row=2, column=0, sticky= tk.W +tk.E)

    response = tk.Text(frame3)
    response.insert(convert(currency1,currency2,amount))
    response.pack()

def frame4():
    frame4 = tk.Frame(root)
    frame4.pack()

    lable = tk.Label(frame3, text='Here you can see all currencies')
    lable.pack()
    currency_list = tk.Listbox(list_currencies())
    currency_list.pack()
    

frame1 = tk.Frame(root)
frame1.pack()

lable = tk.Label(frame1, text='Welcome to the curency converter')
lable.pack(padx= 20, pady=20)
    
btn1 = tk.Button(frame1, text='Compare value', command= frame2())
btn1.grid(row=0, column=0, sticky= tk.W +tk.E)
btn2 = tk.Button(frame1, text='Convert value',command=frame3())
btn2.grid(row=1, column=0, sticky= tk.W +tk.E)
btn3 =tk.Button(frame1, text='List all currencies',command=frame4())
btn3.grid(row=2, column=0, sticky= tk.W +tk.E)


root.mainloop()