How can I reduce the noise of a street in front of the house?
I use a white noise generator while sleeping.  These devices can provide a neutral sound that is fairly relaxing, while drowning out most of the street noise.

This isn't a 100% solution, but it's something that sits on your night stand/dresser and doesn't have to cost a lot.  It can also be taken with you on vacation.

These usually have multiple options for sounds, so if you like trains, ocean waves, birds, or whatever, there's probably a setting for you.  Mine has 11 options (IIRC), and I use the rain storm option exclusively.

I think I've even heard of phone apps to do the same thing.

You might be able to get a white noise generator device with an oil/scent option, to further help relaxing.  This is usually a paper or cotton pad that you put scented oil on, which has a tiny fan to under it to spread the aroma.  I never used it, but it's something to think about.

FYI, pink noise is not white noise.