Now the brake pedal is softer than before I have to push it down

Hello,

It is not normal to have soft brake pedals or a pedal that goes to the floor when depressed.
Soft brake pedal is can be cause by few reasons. It could be there is air trapped inside the brake lines, leak in the brake system, low on fluid or a bad master cylinder.

Here is a helpful article:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

First make sure that the fluid is at the correct level. Also look for any leak, inspect the calipers as well as the brake lines.

It will be good idea to bleed the brake system to purge out any air that might have gotten trapped.

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

If there is no leak, fluid level is good, system has been bled but still having soft pedal, it is likely a bad master cylinder, as the master cylinder is unable to create pressure when the brake is applied.

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.