Post link: https://www.facebook.com/groups/jugbd/posts/4112689492111038/
Oronno Abdullah Al Mamun: IMO, the best spring paid course is https://www.baeldung.com/learn-spring-course
Also, you should read “Spring in Action” book – which has rich content.
Towfiqul Islam: I would suggest you spring boot documentation and you can also follow baeldung spring tutorials.