Via Termux

The old method

termux-setup-storage

pkg install python git

apt install git python -y && pip install telethon

python -m venv venv && . ./venv/bin/activate

cd /sdcard/Telegram

git clone https://github.com/xditya/TeleBot

cd TeleBot

pip install telethon

python3 telesetup.py

Now follow the on-screen prompts.