I just got my new task to convert an existing project (ASP) to JSP with Spring Framework , but the problem is I don't have any experience on creating web app on both side , so I was thinking if is it advisable to enroll on an online courses just to catch up the knowledge that I need ?

Wtf

I don’t envy you.

Sorry for my late response, anyway last July I start working as developer (I'm a fresh grad) to the company where I become an Intern (Android Dev), for my first 3 weeks I just continue what we develope when I was still an intern and when our boss came back from a business trip, they give a new task for every dev, and because of that I was ask to convert an ASP project to Spring MVC just because I have an experience in Java.

So for now they give me a time to study both fields, and I already avail online courses and it really helps me a lot.