Got our first paid subscribers for a travel Telegram chatbot. How can I reach more?

Yesterday we’ve finally launched a premium subscription for our Telegram bot for searching flights - https://t.me/airtrack_bot.

On the first day, we got 2 paid subscribers and that makes me really happy because for the last year we went through the tough times due to COVID-19 that had almost ruined our project. So, we hope that this is the beginning of our redemption.

This is the first SaaS project that I have ever made, so any feedback or advice would be really useful!