I wouldnt worry too much about routine to start with as toddlers seem to stop any form of routine for babies
In saying that I did start trying to slot James into the evening routine early on and when he did go down around 7 or 7.30 it was ok.
Basically our routine was/is
5.30 dinner....sometimes James would have a wee nap then.
6.00 bath...both boys. Initially Tom in bath, James in baby bath....this really only worked well when DH was home and often it was as soon as he walked in the door. I could bath them both but I had to make sure I had something comfy for James to rest on while I got Tom out of the bath and teeth brushed etc) I now only bath James every second night as his skin was getting too dry.
6.30....stories for Tom while I fed James
7pm Tom to bed and James goes when he has finished his feed....anwhere from 6.30 to 7.30 usually.