jamovi

Apologies - I didn't explain that part well. You can choose to have jamovi create the summed total of your questionnaire for each person, and also create the mean of all those items (the mean scale) per person. From a statistical point of view there is no real advantage in choosing one or the other, but in my experience most people prefer to go for the summed total option especially when comparing group performances - it is more intuitive and the total differences in scores between the groups may look more appreciable (though of course if comparing group differences on the mean scale scores then this will give exactly the same pattern as from the total scores).

Thank you again! And these means and summed scores I am able to use for descriptive tables?

Yes - these would be the dependent variables that you would perform your analyses on