Start With OpenWork: One Folder, One Task, and a Look at Every Change
Install OpenWork, a free desktop app in which an AI agent works on the files in one folder. Give it a practice folder, switch it so that every change waits for your click, hand it one task, and check the table it wrote against the files.
Outcome: The overview table the agent wrote for your practice folder, plus a five-line note: the model you used and where your files went, files counted against rows, three rows checked against their sources, one thing the agent got wrong or marked as not stated, and which requests you allowed. It passes when the row count equals the file count and the source files are unchanged.