I have a 6 month 1 week old dd. I also have a 4 year old dd so I probably should know what I'm doing. This may be long and rambly sorry.
When dd1 was born I was still living with my parents and I was a single parent. Having 4 other adults in the house (my brother and sister too) was a godsend and I had help whenever I needed it, especially from my mum who kind of took over.
I'm now living with dp (totally useless, whole different thread) and the 2 dcs.
Dd2 was an amazing sleeper up until she was 5 months. She would sleep through the night regularly and if she woke up she would go straight back to sleep after a feed. She is formula fed.
She has started refusing to sleep. She hardly sleeps during the day and when she does its for no longer than half an hour.
The routine I have is this
Wake about 7.30am
Bottle then back to sleep for 8am
Sleep till 10.30
Breakfast jar
Playtime, mat, bouncy chair etc
1pm another jar for lunch and a bottle
2pm nap for half an hour or so most days but recently it's not been happening
2.30pm up again and playing etc
6pm jar for tea then bath (every second night) and bottle
7.30pm she has another small nap most evenings till about 8pm
9.30pm/10pm up to bed
This is where the issues start. She goes ballistic when I put her in her cat, refuses a bottle and just wants to be held and roll around on my bed babbling. Eventually I will get her off to sleep but it can take hours before she wants her bottle and by this time I'm exhausted and we have disturbed dp who has been sleeping since 8.
I know I'm going wrong somewhere but I'm finding it very difficult to establish a routine with her being so small. I can't even remember the routine I had with dd1 
Can you share your routines with me if you have dcs of the same age?