[Belar]

There are tons, maybe not direct alternatives, but you are not looking for one. It's hard to suggest anything without knowing what kind of "junior dev" you are, but usually specializations, frameworks and even languages have their own communities (Slack, Gitter, forum, Discord, subreddit, you name it), you should look there.

Just don't forget about doing your homework first, amount of effort you put into a question directly influences answers you get. If you take time to do a research, share what you already learned/tried, build a good case with code example (e.g. minimal reproduction on jsFiddle or Codepen) and make it easy for people to help you, you will get help. Otherwise, everywhere you will experience what you did on SO.