We started cooking at home to save on our monthly food expenses.

We started cooking for ourselves to save money.

We should refrain from using electricity to economize on energy.

I started cooking for myself recently.

I recently started cooking for myself.

I go to the library every month.

I go to the library every month.

He attends a class to learn dialects every month.

I decided to start a new project.

He came to Japan for the first time.