Need help choosing specialisation

Hi all, I’m currently doing a post graduate program in Software development. I need to choose a specialisation soon. I’m struggling between Full Stack and Blockchain. I have an interest in both.

I want to know a little about Blockchain app development. How much does the process differ from building web apps apart from writing blockchain logic and code.

And do you think choosing blockchain would be a good option for an amateur coder like me. I can code basic programs in Java and I know I need to do a lot of programming for blockchain which I’m okay with.