If you want to register a domain by the easy way then Alpha Net is the great solution for you. Because Alpha Net provide own domain control panel with easy payment methods like bKash, DBBL etc. Okay then let's start to see step by step that how to buy a domain through bKash payment system.
Use the red marking search box, just type your desire domain and get the search. If your domain available for register by the ICANN record then you see below the option.
Now, just "Select"
Click the "Checkout" button.
Now, if already have a account then just "Sign In" by your current "Username" and "Password". Or create a new account by the click "Create an Account in 10 seconds".
Now, fill-up the form by your valid information.
Select bKash and click "Pay Online" button. Now do complete your payment through your bKash personal account and use under the process. Or click "Pay Offline" for the direct payment.
Next page you get the see a option like this. Place here your bKash TrxID and click the "Confirm Payment" button.
Now, you domain instantly active.