Django, data forms cannot be saved

I have a problem with Django when I would like to get information from the register. I can get their first name, last name, and email but no nickname and graduated schools. I thought i did it correctly since i added nickname and school inside forms.py

forms.py

from django import forms
from django.contrib.auth.models import User
from django.contrib.auth.forms import UserCreationForm
from .models import Profile



class UserRegisterForm(UserCreationForm):
    first_name = forms.CharField()
    last_name = forms.CharField()
    nickname = forms.CharField()
    school = forms.CharField()
    email = forms.EmailField()


    class Meta:
        model = User
        fields = ['username', 'password1', 'password2',
                 'first_name', 'last_name', 'nickname', 'school']


class UserUpdateForm(forms.ModelForm):
    first_name = forms.CharField()
    last_name = forms.CharField()
    nickname = forms.CharField()
    school = forms.CharField()
    email = forms.EmailField()


    class Meta:
        model = User
        fields = ['username', 'email','first_name', 'last_name', 'nickname', 'school']


class ProfileUpdateForm(forms.ModelForm):
    class Meta:
        model = Profile
        fields = ['image']

models.py

from django.db import models
from django.contrib.auth.models import User
from PIL import Image


class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    image = models.ImageField(default='default.jpg', upload_to='profile_pics')


    def __str__(self):
        return f'{self.user.username} Profile'

    def save(self, *args, **kwargs):
        super().save(*args, **kwargs)

        img = Image.open(self.image.path)

        if img.height > 300 or img.width > 300:
            output_size = (300,300)
            img.thumbnail(output_size)
            img.save(self.image.path)

views.py

from django.shortcuts import render, redirect
from django.contrib import messages
from django.contrib.auth.decorators import login_required
from .forms import UserRegisterForm, UserUpdateForm, ProfileUpdateForm


def register(request):
    if request.method == 'POST':
        form = UserRegisterForm(request.POST)
        if form.is_valid():
            form.save()
            username = form.cleaned_data.get['username']
            messages.success(request, f'Your account has been created! You are now able to log in')
            return redirect('login')
    else:
        form = UserRegisterForm()
    return render(request, 'users/register.html', {'form': form})


@login_required
def profile(request):
    if request.method == 'POST':
        u_form = UserUpdateForm(request.POST, instance=request.user)
        p_form = ProfileUpdateForm(request.POST,
                                   request.FILES,
                                   instance=request.user.profile)
        if u_form.is_valid() and p_form.is_valid():
            u_form.save()
            p_form.save()
            messages.success(request, f'Your account has been updated!')
            return redirect('profile')

    else:
        u_form = UserUpdateForm(instance=request.user)
        p_form = ProfileUpdateForm(instance=request.user.profile)

    context = {
        'u_form': u_form,
        'p_form': p_form
    }

    return render(request, 'users/profile.html', context)

I have tried to save by adding form.cleaned_data.get in views.py but it still didn't work. I appreciate all help.