Please check first if you have an eSIM capable device. You can find the list of devices here: https://support.digitalrepublic.ch/en/support/solutions/articles/33000256600-do-i-own-an-esim-compatible-device-

New customers who do not yet have a Digital Republic account can select and activate an eSIM variant directly when they open an account.

You can create a new account here: https://connect.digitalrepublic.ch/dr/registration/signup