1. Please navigate to M2 Admin Panel > Content > Widgets and click Add Widget button.
2. Select "Recent Blog Posts" in Type field and your theme in Design Theme field. Then press Continue button
3. After page refresh enter Widget Title you wish (e.g.: Recent blog posts on Homepage) and specify the sore view if neaded.
3. Navigate to Widget Options tab
4. Set Title field - it will displayed on frontend as title of recent posts blog
5. Set the Number of Posts you wish to show
6. If needed you can show post only from specific category by setting Blog Category field.

Please watch the video: