Have you tried Getting The Bing Image Search key? These are the steps that worked for me.
If not, then it really depends on what data you want. You can take existing open source datasets like imagenet, or explore websites/apps that have good APIs like spotify, which has a lot of tabular data. If you want something more similar to bing search, you can look up “image search free api” or something along those lines.
If you want something less organized, look up web crawling, although you’ll have to be careful to keep it legal and not put too much stress on a website.
And, if you just want to get through the tutorial, feel free to download ~10 images of each bear by hand and recognize you’ll likely get poor accuracy.