Prepare enough space to begin the next task. You do not need to organise your whole life before starting a piece of useful work. A clear patch of table, the right document or a small set of tools may be sufficient.
First, name what you intend to do. “Study maths” leaves a series of decisions waiting. “Explain how to add these fractions using a drawing” gives you a definite starting point and a way to recognise when the session is complete.
Remove one obstacle
Notice what is most likely to interrupt the first few minutes. Perhaps a file is hard to find, a worksheet is missing or the materials are scattered. Fix that specific problem without turning preparation into a larger project than the work itself.
In a shared space, agree on a practical arrangement with the other people using it. A portable folder or a box of materials may be more workable than claiming a permanent desk. The routine should fit the circumstances.
At the end of the session, leave a brief account of what you completed, what remains uncertain and where to begin next time. Keep the result somewhere you can find it again. If the work is unfinished, write a starting instruction before putting it away.
Try this over three sessions and review what helped. Remove unnecessary ceremony and keep the steps that make work easier to resume.
The aim is a manageable preparation routine. Tidiness is not a measure of character, and a well-arranged room cannot guarantee understanding. What matters here is giving the next worthwhile task a clear place to start.