For tinnitus masking and help falling asleep, listen to the soothing rain and thunderstorm.
If you do not find this soundscape soothing, there are many more to choose from at https://youtube.com/playlist?list=PLKFvKGU_m7-Nwnfkd1A5S_GSFgahDsmEL.
To learn more about tinnitus: https://www.soundrelief.com/tinnitus/
Test the severity of tinnitus: https://www.soundrelief.com/tinnitus/tinnitus-impact-survey/