Decorate a room on a budget without a full refit

Help me decorate a room on a budget.

Room: [which]
Budget: [amount]
What bothers me most: [colour, clutter, light, furniture]
DIY comfort: [paint yes/no, assemble furniture]
Must keep: [sofa, carpet, etc.]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. A prioritised plan ranked by visual impact.
2. A shopping list by must / nice.
3. A weekend sequence.
4. What to skip that looks busy but changes little.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts, diagnoses or legal outcomes. UK English.

Stay in this ChatGPT chat. Do not turn on apps or connectors, and do not use memory from another chat.