At 8 weeks I wouldn't be overly concerned with a routine as such. You're still getting to know your baby, recognising what his different cries mean, learning the cues that he is becoming tired, hungry etc.
You've already started with an important one in establishing a recognised bedtime and being clear in your actions that this is sleep time. Don't worry too much about the actual time because as your son gets older and daytime sleeping patterns change so does the bedtime.
In the first 3-4 months your son will change so much with levels of alertness and how long he can stay awake for that any routine now would have to change so rapidly it would make your head spin.
I found it easier to have loose structure to my day in the first few months while I learnt all the cues and by the time I felt I knew what all the noises, face pulling, movements etc meant I found I was in a flexible, workable routine anyway. So for example ds1 would wake between 6-6:20, bum change from night nappy' feed, another bum change and a bath (couldn't bath at night as he'd get wired),
get dressed and playtime and then he'd want to sleep again by 8-8:30.
Another feed 10-10:30. Whatever other activities we did i.e out in pram or sling. Talking, singing etc until he was tired again. Nap, feed, play and the cycle continues until bed.
At first I found myself child led into a 4ish hourly feed pattern, with sleeps close to feeds so I was able to plan my day based on this.
However as my child got older this changed so may times that I was glad that I'd taken the first months to decode all the signs for baby's wants. I could then adapt to his developmental changes without a melt down as my 'routine' went out the window.