Yes, telegram marketing is not so simple
From my practice, the best approach is:
1. Announce a lottery, contest, raffle, compete with gifts and empanada in chatbot
2. Search for channels (telegram search, google, channel lists) with your target audience
3. Purchase ad postings there, announcing your event.
4. Get a lot of cheap traffic
5. Organize event, awarded.
6. Use sales funnels (lead breeding) and transmissions on your bot to keep in contact with subscribers and make software offers.
Using chatbot instead of channels helps you create custom user trips
If you participate in e-commerce, try our chatbot solution ready to use: https://telespace.me/apps/e_commerce_bot
I hope you have served me, greetings.