I found the BW's EASY was the complete opposite of what my DC needed. Eating before sleep was the only way to get any sleep before 6 months old.
By 12wo, DC liked a feed at about 8pm. So 8.30pm became bedtime. We did the same things in the same order: pyjamas, feed, song, cuddle, dark room, but didn't worry if the feed had started 10/20 mins early or late. At 12wo, DC still needed a night feed, so I would actively wake DC at midnight and feed then to avoid being waken by hungry baby at 2am.
After the midnight feed DC slept to 6am, had another feed and straight back to sleep until 9am. Up in time for a quick feed and get dressed and out to whatever baby activity / out for a walk at 10am so I could get out of the house.
2 daytime naps around 11.30am and around 4pm.
Fed on demand around this too. Once older, DC could eat and not immediately sleep.
DC is now 3yo and is an excellent sleeper at night (8.30pm to 7.30/8am) - has only woken at night 3 times in the last 2 years.
One thing I would change: I had done (gentle) sleep training for naps when DC was about 14 months, but we went back to feeding to sleep for naps during a holiday at about 20 months. Feeding to sleep stopped working, and the 2nd round of sleep training was resisted, so DC was only napping when exhausted. So I feel I should have kept going with the no feed before a nap routine.