If you're not in the US note the country specific subreddits in the right hand box on https://www.reddit.com/r/personalfinance/wiki/investing
The recent "Ask HN: What are the best strategies for a new grad engineer to build wealth?" https://news.ycombinator.com/item?id=22274207 might be relevant to your situation (it talks about Silicon Valley salaries, not everbody has those).