I want a web designer

Dear all, For a Drupal 9 project I need support with the following. I have a datatype containing the columns: Date_Begin, Date_End, Value, Class I would like to, 1) create a view that groups by Class and for each group calculates and displays the sum over the column value in the view 2) create a diagram displaying Date_Begin on the X-axis and Value on the Y-axis 3) I would also like to implement a Gantt chart using Date_begin and Date_end (there is a module for Drupal 7 - see image attached) I would like to have this implemented in Drupal 9. Who can help me with this? Best regards,