I make 120k in a medium sized city where the median income is about 75k. I'm pretty content, tbh. I also don't buy shit i don't need. Most of my expenses are my hobbies. I do have a lot of hobbies. But I still make enough every two weeks where I'm able to stash it away in a savings account.
Now if I only knew how to and had the balls to invest beyond retirement accounts.
Investing tip #1: don't take advise from strangers on the Internet
Investing tip #2: get a zero commission trading app, like Fidelity or TD Ameritrade, and just squirrel away a bit of each paycheck/monthly/whatever into a low expense ratio, broad market ETF, like VOO (https://etfdb.com/etf/VOO/#etf-ticker-profile)
Start slow, but contribute regularly. Keep enough cash in the bank for emergencies, and don't bother even thinking about trying to "time the market" - just set it and forget it.
Criteria for that one: low expense ratio, so you aren't losing (much) money to the fund manager, large market cap, so you are less succeptible to shock, and the ETF probably isn't going anywhere, and as a S&P 500 ETF, it holds stocks from all 500 businesses in the S&P 500 (weighted by the respective market cap of said businesses), so it's not tied to any single sector, making it more resilient for long-term investment.