Project Time sheet

Hello

I want to create a time sheet to track my time against different projects.

I'll have a start and end time to fill in and a column working out the amount of hours.
time 1.png

I want to create a drop-down list for my project numbers (which I want to be able to add new projects to list as I go along).
time 2.png

And then I want a table to work out the total hours worked against each project.
time 3.png


Are there any good videos or threads you guys could recommend that could help me to achieve this.



Thank you in advance

I've got it to work on my sheet 1, but as soon as I move to sheet 2 it doesn't work like it should.