Sure, start a routine but be aware that the minute you establish one he will change it.
Have one that is pretty flexible because it will change as he grows and get more mobile.
The sleep on is probably the most important as it helps both of you but then some days he will have 2 sleeps and others just 1.
If you have a child where you can have a routine go for it but expect to have jealous mums bemoaning your good fortune.