Tourist Visa Acquisition

Hello Team

I would like to enter Vietnam and stay for maximum 21days and would like to know the process to secure a tourist visa online since there is no such embassy in my country. If it's possible to apply and pay for visa fees on behalf of others too let me know.

I wish to also know how much it would cost for a tour package for two people, kindly assist with the iterenary and prices for 3 days tour and accommodation. Thanks