What are the CMS for freelance java-backend developer?

Question

CMS

I want to try my hand at freelancing, but I only know Java backend (Spring) and little by little jquery, html, css. What CMS do you recommend for development? (only heard about Riot). Is it possible to work in conjunction with popular CMS like wordpress, drupal, joomla?
What can you say in general about the idea of ​​earning freelance on Java in this way? or is it still worth learning the frontend and trying to develop without cms? Thank you for your attention! I will be glad to constructive answers and comments!

Answer 1

Why do you think freelancing is less demanding than working?
At work, you will have colleagues who will help you, and if you do not pass the interview, then why do you think that you can do something useful for the customer?
You can try to learn PHP, since the entry threshold for the first job is much lower than for Java. Well, or front-end, but something tells me that it's easier to start with php.

Answer 2

What can you say in general about the idea of ​​earning freelance on Java in this way?

Try to get a job in the company as a Java Junior Developer. Gain experience and then you can already think about remote work or freelancing.

Answer 3

You will not find customers on Java CMS.