I personally think the babies decide when they sleep through! My lo has been very good from the beginning; she has only ever woken up at 3/4am, but I don't believe it's anything we've done, she's just that way! We do a "routine" - bath, massage, bottle, bed. Started this at 6 weeks. Before that we always fed her last feed (about 10) in the bedroom, in dark, didn't talk to her etc... So she knew it was bedtime.
Also, sleep breeds sleep so nope you don't need to keep them awake during the day. My lo naps quite a lot during the day and always sleeps well! So you're deffo doing the right thing Hun! X