Welcome to the Airtable community!
Track hours is a very common use case for Airtable.
I suggest that you have a slightly different approach to your base design.
Create a [Tasks] table with the basic information for each tasks (such as the owner and weeks).
Create a [Timesheet] table for tracking time. This table would have columns for the task (a link to a record in the other table), the week, and the hours worked.
Then use the Pivot Table block (available with a Pro subscription) and some formula fields to generate the grid you want.
One advantage of this system is that you don’t have to give technicians access to the entire base for them to enter their hours. They can enter their information using a web form
If you would like more help building this base, there are several Airtable consultants (myself included) that can help build a base for you.
If this answer gives you enough information to solve your problem, could you please mark this post as the solution?
If not, please give a bit more details on your situation.