I didn't feel trapped around naps and feeding, but I wasn't trying to do a routine and had babies who would nap basically anywhere. If you are stuck with a baby who will only nap under specific conditions, then you can't really do anything to change those conditions. If she's doing GF IIRC it's naps in pitch black in the nursery in the cot, so she'll be stuck at home for thr duration of the nap plus however long it takes to get the baby to sleep. However many times a day they nap, which is probably something between 2-4x depending on the age of the baby.
You are busy all the time. Mostly just trying to catch up on whatever you can't do because the baby is consuming 100% of your attention and ability, and you're on reduced capacity in general because babies don't sleep and hormonally you're a bit away with the fairies. They also feed a lot, especially when breastfeeding. And doing anything takes at least 50% extra effort and planning, sometimes 150% more. This is little things like going for a wee and making a cup of tea, and bigger things like putting the dishwasher on, making lunch, having a shower, going anywhere. Because you have to think about the baby as well, make sure they are happy/sorted/dressed appropriately/had a feed/sleep/etc. She is also possibly spending an inordinate amount of time researching the next milestone, whether that's weaning or sleep training or jabs or Christmas presents or organising and buying the next size of clothing.
I didn't have to plan stuff weeks in advance but days, yes. Because I'd get into a pickle where I'd think right - OK someone needs to come over but the house is a tip and I need to go to the shop to buy the nice coffee, I haven't had a shower, nobody can see me like this. I've got to buy nappies. I'd NEED a couple of days to prepare!
I think a lot of people assume they will have plenty of free time on ML but it's not usually the case :D