http://ferdinand-muetsch.de/how-to-make-telegram-bots/
https://medium.com/@Khodl/how-to-create-your-own-telegram-bot-who-answer-its-users-without-coding-996de337f019
https://unnikked.ga/getting-started-with-telegram-bots

By the way, there is a new Bot Developers Forum where people is helping each other too:
https://botsfortelegram.com/project/telegram-bots-dev-community/