Doesn't sound like excuses to me, just someone trying to puzzle out a challenge.
I'm going to throw out some ideas - take anything that's useful and ditch the rest.
Have you plotted out your days and weeks - work time, chores, rest time, sleeping etc? So you can see when you have time to recuperate and study, but also see visually how you are using your time. Sometimes that can help to see what can be done differently and help prioritise.
Writing plans and timetables down on paper can also help to ease the volume of stuff you're trying to hold in mind and relieve some pressure. You might find that you're trying to remember all the things you need to worry about - and then becoming more stressed about trying to remember it all (I know I do this). Writing it down can instantly lift that part of the stress off your shoulders.
A worry diary can also help if you find you're going in loops in your mind - every time you start to worry or feel overwhelmed, write it down somewhere so you can forget it. Then come back once a day and cross off the things that don't really matter and make a plan for those that do.
How long are you trying to study for each time? If you're currently aiming for heavy sessions, maybe break it into smaller chunks instead and then add it into your routine. Eg 30 minutes before work, 30 minutes at lunch, 30 minutes in the evening - and then that's an hour and a half a day but without the same sinking sensation of trying to sit down for a long study session in one go.
Have you blocked study time in your calendar? That can also help you get into a habit with it, which means it starts to feel less of a battle to get going each time as it becomes instinctive.
Have you given yourself designated days off? This is as important as having a regular study routine. I would say you should ideally have one day a week with no studying and no expectation to study. It will help you decompress and make it feel less relentless.
Do you have any friends who are also studying? Are you on any forums from your study provider? A bit of solidarity can help.
Is your next exam booked yet? Having it visually plotted out as a countdown can be helpful to organise your time but also to remind you that this is temporary.
It might feel like you will be studying forever but before you know it this will all be a memory. Keep focused on the end goal and that this is a short term challenge.
Have you talked to your tutors for any advice?
On the mental health side specifically, caba provides support to ICAEW students so might be worth a look: https://www.caba.org.uk/
https://www.icaew.com/insights/student-insights/heres-how-to-make-a-plan-for-your-wellbeing