No possibility to connect through computer audio but only through call

Hi, Mia.

You need to check the audio settings. Try this:

How to enable audio as a host

1. Sign in to the Zoom web portal.
2. From the navigation panel, select Settings.
3. Click the Meeting tab.
4. To enable Audio type, click the audio option that you want to use.
   • Telephone and Computer Audio: Participants can join by telephone or by using their computer's microphone/speaker or headset.
   • Telephone: Participants can only join by telephone.
   • Computer Audio: Participants can only join by using their computer's microphone/speaker or headset.
   • 3rd Party Audio (only visible if you have 3rd party audio😞 Require that all participants follow the instructions you provide for using non-Zoom audio.
5. Click Save. 
   Note:  If Audio type is disabled and locked, 
    
    contact your account administrator. 

This link might help: https://support.zoom.us/hc/en-us/articles/360061128131-Enabling-audio-type