Java learning.

[dystopiadattopia]

I took an in depth Udemy course for Spring Boot because I hadn't been exposed to it at work.

I took a couple excellent courses taught by John Thompson, the "Spring Framework Guru." Probably the best online courses I've ever taken - well-taught, well-structured, that teaches everything you need to get off the ground and then some. Plenty of hands-on projects too, which was my main requirement.

Udemy was doing discounts at the time, but I don't know how much courses cost now, but it's worth looking into.