Develop a bot for Telegram

It is necessary to develop a bot of an educational course for telegrams. The main function is posting on the schedule of messages consisting of text, audio, video. All content is sewn inside, the admin panel is only for managing start dates. The total volume is about 100 messages. Details: https://miro.com/app/board/uXjVOTBUVmo=/?invite_link_id=857630182122. The landing page indicated on the scheme is not included in the work.

In the proposal, please specify an estimate of the time and cost of development and examples for previously performed work.

Thank you!