Help with creating an android studio application

I would like to indicate that I have made part of the design of the application, such as the database and some designs (layouts such as login, sing up or the menu), although I have problems finishing my application or making the design
I need someone who can help me finish it.

The idea of ​​the application is this:
Key Functions:
1. Login:
• Description: A clean and uncomplicated login screen.
• Functionality: Veterinarians can access their personal accounts by entering their username and password.
2. Veterinarian Registration:
• Description: A page for new veterinarians to create their profiles in the application.
• Functionality: A basic form to enter data such as name, address, professional license number, etc.
3. Main Menu:
• Components:
• Veterinarian Information: Displays the logged-in veterinarian's name and surname.
• Available Options:
• Medical Appointments: Appointment management (to be developed later).
• Notifications: Alerts and reminders for the veterinarian (to be developed later).
• News: Relevant updates and news (to be developed later).
• Patients: Current patient list and option to add new ones.
• Mail: Internal mail system for communications (to be developed later).
• Messages: Space for internal messages (to be developed later).
• Settings: Account configurations and application preferences.
4. Patient Section:
• Description: This is the core of the application, where veterinarians can manage all information related to their patients.
• Functionalities:
• Patient Listing: Displays all animals under the veterinarian's care.
• Add New Patients: Allows for the entry of new patients into the system, including details like the animal's name, species, breed, etc.
• Patient Profile: Upon selecting a patient, it displays:
• Animal Photo: An image of the patient for quick identification.
• Medical History: A complete record of all consultations, diagnoses, and previous treatments.
• Add New Medical Records: Ability to enter new medical events, treatments, and diagnoses, updating the patient's medical history in real-time.
Finally, to summarize, the application essentially registers veterinarians so that they can log in and access their patients, whom we will also add with their medical histories and treatments. The database should be local, meaning it resides where the application is installed. This design is intended to ensure a seamless and efficient user experience for the veterinarians in managing their patients' information.