To comply with GDPR we will not store any personally identifiable information from you. Therefore we will serve sub-optimal experience where some features such as Login/Signup are disabled. However, you will be able to search and see all the properties, see agent contact details and contact them offline on your own.
You are definitely allowed to purchase HDB unit at any age. The only concern is the financing portion. Are you using your CPF to finance the unit or are you paying fully by cash? How much can the bank loan you when you want to purchase a resale 3 room flat and have you met with the necessary requirements set by HDB?
Do feel free to contact me if you require further assistance.