Okay, so the first thing I would say is to try and control your sleeping and eating habits i.e. try to establish a routine. I know it can often be easier said than done, you may need to seek extra support which is fine, but this helped for me and I had the help of family and friends for support.
Secondly, have you spoke to your supervisor about what he/she expects from you regarding the review? This would be the best port of call with regard to what structure you should follow, what papers to start with, how long the review should be etc.
It is very normal at some point to feel that you need to re-do the process or part of it, I was also caught out with this feeling when I wrote my first review and it can be very daunting! Really it just shows how you have improved and developed as a writer from the work/reading that you have already done towards it, even if it doesn't feel like you have doe much. A big part of a literature is reading and absorbing information, therefore, it is only natural to feel as though you have done less than you actually have.
100% ensure that before writing you have a basic structure/outline of your review, or at bare minimum simply have a contents page done (as trivial as it sounds, I find it really helps!). I have some resources I can send you, just some links to a couple of websites, so I'll comment these below. I have also attached a 'critical reading log' and a reading/writing guide that I put together myself on word. It is also worth looking at your university resources to see what they have that can help. I found a whole guide i never knew existed through my university portal! So you never know what you might find there?
With regard to the paragraph you wrote, it sounds okay but I think what it really needs is one of you own ideas. What are the common concepts in the literature? Do the authors statements/findings agree with each other? What do you think about what the authors have said? etc.. These are common uestions that you should be asking yourself when doing a literature review.
If you have never done one you wouldn't know so don't be hard on yourself if you don't know! As boring as they are, lit reviews are a great opportunity for you to really become knowledgeable and learn about your subject. Lit reviews are very daunting and having some structure and guidance from your university and supervisor/s are your most important resources! Most of all, look after yourself and give yourself some time to sit back, relax and reward yourself. Working flat out 24/7 doesn't work as many will claim it too. You can't think clearly and what you write could not be as good as it could have been were you focussed. Please don't make this mistake as I did! I wrote about 7500 words of pure garbage in two weeks, pulling all nighters in the library and proper cramming, it didn't work. Is it only the review that is in for may, or the full dissertation?
Useful linksWriting guide -
https://www.scribbr.com/dissertation/literature-review/Phrasebank -
http://www.phrasebank.manchester.ac.uk/Writing guide (PhD) -
https://www.findaphd.com/advice/doing/phd-literature-review.aspxAttachmentsCritical reading log
Reading and writing guide
I hope the resources I have provided help in some way. You may not need all of them - the PhD lit review guide has some good writing tips but you probably don't need to go too deep into the nitty gritty here. Please also make sure that the attachments I have provided fall in line with what you are being asked to do by your university if you are going to use them. The guide I attached is my kinds of 'cheat sheet' for reading and writing with all of the imediate promps I need. This might work for you, but you might find your own way. A lot of it is about finding your own way tbh.
Please get back to me if anything doesn't make sense or if you need me to explain anything further. I will be more than happy to help as I have been in the same situation as you!
Best Wishes!