Need help with choosing a JS framework for making games. So far I heard only posotive things about Phaser. Any other recommendations or thoughts on Phaser?

My dream is to make video games. Knowing that I learn Java at school, which langage is the most appropriate for you? My teacher, who is a java fan, told me java, of course. On internet I found c or c++, and I even found a JS framework (phaser), but the doc wasn't great.
Do you have advices ?

I'm a web developer that would like to do some game development. I focus on front end, and have done backend work (not a lot of databasing, though). I mainly use JavaScript and Python, with enough knowledge of Java, C#, and PHP to get by when I need to. I've also got a background in graphic design.

What aspects of game development might be a good fit for my skillset?

Where and how do I get started? I've looked at Phaser in the past, since it was inspired by Flixel, a Flash game library I used for a some simple projects in college.

A game. A simple pixel-art, 2D game.

I told myself I'd start it after wrapping up other projects. When I did, I checked the docs for Electron and Phaser and... Well, lemme do some Node projects first...

In a Phaser game, I was unknowingly overriding a method of a parent class. It must've been Phaser.Group or Phaser.Sprite that my class was extending, I was calling destroy() on it without realising I was calling the parent class' method too and was baffled about why shit wasn't working. Found out maybe two days later and changed the method 'destroy()' in my class to 'pokeItWithAStick()'. This was at a previous job, but I'm mostly sure that it stays that way in the codebase three years later.

Hi, I'm a full stack developer. I want, with a friend of mine, to develop a multi platform mobile game. It will have online matches, a scoreboard, a shop. Something like "clash of clans" or any other online game. 
I read about unity, phaser, unreal engine and many others technologies I have never used ... But I don't know which one to choose and start learning. Do you have any advice? Any articles, guide about game dev? Someone who was in my situation has suggestions, or just tell his story?

Have started with game development using Phaser. Let's see if I am able to get some cool ideas!

I have learnt html,css, and some basic javascript for web development,and made a few projects including a calculator with prompts.This is the code :

<script type="text/javascript">
function prote(){
let firstNum=prompt("Enter first number")
let secondNum=prompt("Enter second number")
let num1=parseInt(firstNum);
let num2=parseInt(secondNum);
let result=num1 + num2;
alert(result);
}
function prote2(){
let firstNum=prompt("Enter first number")
let secondNum=prompt("Enter second number")
let num1=parseInt(firstNum);
let num2=parseInt(secondNum);
let result=num1 - num2;
alert(result);
}
function prote3(){
let firstNum=prompt("Enter first number")
let secondNum=prompt("Enter second number")
let num1=parseInt(firstNum);
let num2=parseInt(secondNum);
let result=num1* num2;
alert(result);
}
function prote4(){
let firstNum=prompt("Enter first number")
let secondNum=prompt("Enter second number")
let num1=parseInt(firstNum);
let num2=parseInt(secondNum);
let result=num1/num2;
alert(result);
}
</script>
</body>
<form>
<br>
<input type= "button" value="Add" onclick="prote()" />
<input type= "button" value="Subtract" onclick="prote2()" /><br><br>
<input type= "button" value="Multiply" onclick="prote3()" />
<input type= "button" value="Divide" onclick="prote4()" />
</form>

However I want to do game dev and I feel it may have been a mistake to start learning web development,I originally started learning code in roblox studio,however some do not consider making games in roblox studio "REAL" game development and I didn't exactly feel it was either.I messed around with unity and found the layout quite similar to roblox studio. However
I heard phaser uses javascript and Unity uses C#.In which case using phaser would not require using a new language.However I am aware that If I want to make 3d games(Which I do) I will have to move to unity eventually.Basically, as a beginner should I switch to unity and C# first or Phaser and javascript first.