Yvonne welcome to the boards
The best way to do it is to chose a start time (wake up time) for your routine, then feed then or half hour after.
For example if you want your start/wake up time to be 8am, your feed at 8am (between then and 8.30),
any feeds prior to this are night feeds and you should try and get your LO back to sleep. This means a small night feed and full feed at 8am or a full night feed and topup at 8am.
In your case because your LO is in bed for 6pm, there is little change they will go back to sleep. So you have to decide if you want to leave as is 6pm to 630am or move the day forward so your LO is in bed later and waking later i.e 8am to 7.30pm
Hope that made sense.