Just use Signal if you want an easy, relatively privacy friendly and secure messenger.
Telegram hands over data to goverments, is infested with spammers and scammers and its encryption is not end to end for group chat which lets Telegram access those chats.
Edit: Telegram is great for lots of things like big groups, communities, piracy, drugs etc but its just not the place where you should expect secure communication.
This might not be relevant because you have other reasons not to use Signal, but you can get android signal directly from their website and via aurora store (on fdroid)