'No one tells me what to do'.
You could take that out of the equation, couldn't you? If you were to tell others how you like to be offered suggestions then no one you value would make the error of 'telling'. (It's so easy to fall into the familiar 'school' model.) If you need it delivered differently - please say, instead of going without information that could be both useful and valuable - once you've tweaked it to suit yourself.
For your book - what has to be done? What works best for you? What settles you in to work? Who do you have to catch up with?
Coming home and flopping. Fair enough. However, a change of motivation might be in order.
The more you tell yourself about the awfulness of the ho-hum job the more you KNOW you need a reward, or relief, or 'me time'. If after work is the only time available - that's what you'll take. Valuable, essential ME time. Sleep doesn't count, unfortunately.
Is 'early to bed, earlier to rise' an option for you? If you got up earlier and used your 'best' time FOR YOU, and the book, you could come home from work, putter about, work on something completely different from 'office work' and head to bed knowing you've fed your heart and soul.
If you get a decent lunch break - could you do editing then? Print out the pages you want to work on and do it in a place that actually supports that kind of activity. An office. Your brain's already keyed up for the task. No one's
telling you; you're simply tacking the editing on to 'more of the same'. Catch and use the flow, perhaps.
You don't have to do this. You GET to do this. And it might help if you leave the ho-hum job where it belongs when you walk out at night. You get to go home, have a yummy supper, unwind, restore yourself and capture ideas from what you're seeing on screen or online. Seeds for the future.
The Job pays the bills; gives you resources for creating and concentrates your creative work by providing a limit on the amount of time available. Structure and discipline. Are those things you value now?
Follow through. What will you do every day? What structure will you create for yourself? What are you measuring?
If you find a week has passed and the intention has been added to the Underworld Road - STOP. (Or not, as you choose

) How could you change it? Make it easier and near-effortless? Put it into a different time in your day? You've just had feedback that the system needs tweaking if you want it to deliver the goodies. It has very little to do with 'you'. Systems don't care about your work ethic and weaknesses. Scoundrels and saints can all get a ticket from the system for the bus, no? Set up your systems to deliver what you need day to day.
If you work in a job that has been in place for a long time and someone else designs/implements changes and measures the effectiveness - you're just there to run it - it can look like weird new territory to actually explore what's 'under the hood'. It's worth the effort. No excuses required.
Over to you.