I find the white noise (or pink) has to be quite loud. As she got sleepier I'd turn it down.
I really feel for you, it's so rough. It's exhausting trying to get a baby to sleep. Mine sounds similar to yours. She is 9 months now and we still struggle. At 6 weeks I remember we went a week with maybe only 1 or 2 naps. It just didn't work. No matter what awake periods I used. It was awful.
Things do get better though, slowly slowly you'll get there. Even if it feels so unlikely atm!
I walk a lot. It takes 20-30 mins for her to fall asleep in the pushchair or sling and then I still have to walk for the length of the nap! I know you said this doesn't work for you, but maybe keep trying and at least you'll be getting fresh air.
I found it worked best for us to always have one less nap than the 'reccomended' amount. For my sanity!
And I tried to go for a decent work 1st thing. I found fresh air and getting a good first nap (or at least quiet time for the baby) really helped set us up nicely for the rest of the day.
Other ideas rocking in a bouncy chair, holding while on exercise ball, holding then upright rather than cradle, firm pats on bottom, shushing, heartbeat rhythm pats on back.
My babies preferred one is being held upright against my chest with firm bum pats.