get_create_form no me genera un form personalizado

[NoxCreation]

Hola, según la documentación, debo poner el método get_create_form dentro de mi modelo. Modelo que hereda de BaseModel. Resulta que mi interfaz no aplica los cambios. Tengo la siguiente clase de formulario:

class ClientForm(forms.ModelForm):
    class Meta:
        model = Client
        fields = [
            "kyc",
            "first_name_telegram",
            "username_telegram",
            "chatID",
            "language_code",
            "first_name",
            "last_name",
            "age",
            "numberID",
            "phone",
            "nationality",
            "wallets",
        ]
        labels = {
            "kyc": "kyc",
            "first_name_telegram": "Nombre de telegram",
            "username_telegram": "Usuario de telegram",
            "chatID": "ChatID",
            "language_code": "Lenguaje",
            "first_name": "Nombres",
            "last_name": "Apellidos",
            "age": "Edad",
            "numberID": "Identificacion",
            "phone": "Telefono",
            "nationality": "Nacionaldiad",
            "wallets": "Billeteras",
        }
        widgets = {
            "first_name_telegram": forms.Textarea(attrs={"class": "form-control"}),
            "username_telegram": forms.Textarea(attrs={"class": "form-control"}),
            "chatID": forms.Textarea(attrs={"class": "form-control"}),
            "language_code": forms.Textarea(attrs={"class": "form-control"}),
            "first_name": forms.Textarea(attrs={"class": "form-control"}),
            "last_name": forms.Textarea(attrs={"class": "form-control"}),
            "age": forms.Textarea(attrs={"class": "form-control"}),
            "numberID": forms.Textarea(attrs={"class": "form-control"}),
            "phone": forms.Textarea(attrs={"class": "form-control"}),
            "nationality": forms.Textarea(attrs={"class": "form-control"}),
        }

En mi modelo:

class Client(BaseModel):
    kyc = models.BooleanField(blank=True, default=False)
    first_name_telegram = models.CharField(max_length=100, default="")
    username_telegram = models.CharField(max_length=100, blank=True, default="", unique=True)
    chatID = models.CharField(max_length=100, unique=True)
    language_code = models.CharField(max_length=5, default="es")
    first_name = models.CharField(max_length=100, blank=True)
    last_name = models.CharField(max_length=100, blank=True)
    age = models.IntegerField(verbose_name="age", null=True, blank=True)
    numberID = models.CharField(max_length=20, blank=True)
    phone = models.CharField(max_length=20, blank=True)
    nationality = models.CharField(max_length=20, blank=True)
    wallets = models.ManyToManyField(Wallet, blank=True, default=None)
    login_required = True
    model_permissions = True
    permission_required = (
        'api.view_client', 'api.add_client', 'api.change_client', 'api.delete_client'
    )

    def __str__(self):
        return f"{self.first_name_telegram} / {self.username_telegram}"

    class Meta:
        ordering = ['-pk']

    def get_create_form(self, form=None):
        from dashboard.forms import ClientForm
        self.create_form = ClientForm
        return self.create_form

    def get_update_form(self, form=None):
        from dashboard.forms import ClientForm
        self.update_form = ClientForm
        return self.update_form

Qué me falta aún que no he hecho?

[NoxCreation]

Fijándome en el video de youtube para form personalizados, hice lo siguiente y salió:

def clean_first_name(self):
    print("first_name: " + self.cleaned_data['first_name'])
    return self.cleaned_data['first_name']

Es decir, que lo que no está cogiendo es el tipado de los atributos en los widgets que le pongo. Para comprobar lo usé en otro template y mi form funciona ok con los atributos y todo. Pero por algún motivo, esta forma que recomiendan no lo admite. Uso django 4.1