Thoughts, opinion and advice welcome

My son is 8 months old and co sleeps and nurses constantly at night. Tonight I tried the Ferber method for bed time. Nursed him like normal and tried to lay him in his crib he of course woke up and cried. I turned on his sound and light machine and let him cry. He was more so whining than crying ( no actual tears). I checked on him in 5 minutes then 10 then 15. He would stop crying and eventually stopped crying and laid in bed playing with one of his toys (a tooth brush he likes to chew on). At an hour time he was still awake just lying there with his tooth brush. I’d say for now it was successful. I’ll update in the morning. Going to also try this for naps as well.