Discord bot to verify new users on server

I am creating a new Discord server and I need to approve only some specific users on the server. This is what it should look like:

The bot sends new users a message that to get verified they should add some specific word to their Instagram bio. A person then adds that word to their bio and sends a link to their Instagram in the verification channel. After that, the bot checks if the bio now has that specific word. If it does the bot allows the person on the server and changes his nickname to their Instagram name.

As I was told, the bot can be written in either Python or Javascript. For this job, you should have experience with Discord bots. At the end of the assignment, I should receive a working solution on my server.

Hi, I may know someone for you. What's your budget