Spring Recipe based Training
A good way to dive in-depth with any technology/framework is actually to try out every essential feature yourself. If you want to learn Spring Framework and do not know where to start, here is the material to get you started.
I have formulated recipe based training — each recipe is a mini project focused on a particular problem and a feature to address that. I ran this programme for a small group of newbies. It was a huge hit! This also helped keep the training async considering the current covid situation.
Hope it helps you too.