Hey, I have been exactly where you are, and the best thing you can do is stop trying to write in order. Start by grouping your sources into small themes or arguments instead of listing everything. Create a simple outline with three or four main points and place each source under the point it supports. Once your structure is clear, write one small section at a time. Also, if you feel completely stuck, I found that using
https://essaywriter.org/dissertation-writing helped me understand how to structure my own review properly. You do not have to figure this out alone. Just take one small step today.