There are several contests out there. Check #monomad for daily b&w topics and here is a list with other challenges too.
Monochromemonday - initiated by @old-guy-photos
TreeTuesday - initiated by @old-guy-photos
BeachWednesday - leaded by @lizanomadsoul and initiated by @uwelang
SunThursday - leaded by @lizanomadsoul and initiated by @uwelang
LoveFriday - initiated by @liliana.duarte
DanceWeekend - initiated by @uwelang
MarketFriday - initiated by @dswigle
SaturdayView - initiated by @luxurylifestyle
Caturday - initiated by @dswigle
BeautifulSunday - initiated by @ace108
IntroduceYourHomeTown - initiated by @redtravels
BeautifulDay - initiated by @barbara-orenya
...and challenges
BeerSaturday - initiated by @detlev
ColorChallenge (with daily color tags too) - initiated by @kalemandra
Bwphotocontest - initiated by @daveks
MyPictureDay - initiated by @timsaid
DailyPhotoContests by @juliank: (- Monday: #foodphotography and #animalphotography; - Tuesday: #landscapephotography and #cityscapephotography; - Wednesday: #architecturalphotography and #vehiclephotography; - Thursday: #macrophotography and #colourfulphotography; - Friday: #streetphotography and #portraitphotography; - Saturday: #sportsphotography and #smartphonephotography; - Sunday: #goldenhourphotography and #longexposurephotography
Thanks I will have a look 😊