need to download photos from iClould to my computer ..HOW???

1. On iCloud.com, log in to your account.
2. Click Photos and select a photo or video. Hold the command key on your Mac or the control key on your PC to select multiple photos or videos. 
3. Click and hold the download button in the upper corner of the window. If you want to download your photo or video as it was originally captured or imported, choose Unmodified Original. For JPEG or H.264 format — including edits, and even if it was originally in HEIF or HEVC format — choose Most Compatible.*
4. Click Download.
5. Your files may or may not download in a zipped format.

Source: https://support.apple.com/en-us/HT209454

Poland-Hill-CH Said:

"need to download photos from iClould to my computer ..HOW???"

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Downloading it All:

You could download it all, and then extract it from the download. See here: Nifty "iCloud Drive-to-External Hard Drive" Download Tip: - User Tip