Nope you should be able to join any telegram group as long as you have an address to join.
1. Open Telegram Channels Catalog in your internet browser.
2. Find a channel you want to join.
3. Tap Add To.
4. Select Telegram.
5. Tap Always or Just once.
6. Tap JOIN.
You can search for channels using the @ or you can check out
https://tchannels.me/ to search for channels you would like to join.