With the advance in machine learning nowadays, its easy to use AI to generate images for your blogposts instead of using photos from stock photo websites.
The main benefit in using AI to create images vs using stock photography is the uniqueness of these images and the cost involved in generating images is pretty cheap.
You can try using the Dall-E service from OpenAI to start creating images.
All you need to do is write a sentence which describes the image you want to create and the AI will do the rest.
Once you have your initial image, you can finetune it by adding in more descriptive terms.
Once you are familar with the Dall-E service, you can get images created for approximately 50 cents - 1 dollar for each image you need.