We suggest to not use your main personal account (you can use a new account number).
Just try to use your new account for few days sending and receiving and after sending bulk from it.
Use keymarkers and dynamic parametrized feature of our app
When you start send bulk from new account start with small bulks.
Join Open WhatsApp Groups and make some conversation there.
Try to write message in a way that recipient do not report it as spam (this is the most critical issue with new accounts).
Add your numbers and your friends number that you usually chat with them and set initiate dialog with them after x amount of messages
Give your account more credibility by joining groups
Do not send more than 600 messages per hour. Bulk Whatsapp Sender has a unique capping option where you can tell Bulk Whatsapp Sender when to stop sending messages.