A single stock is high risk, an index fund is very diversified, and while it does fluctuate with the market, overall the risk is very low on a long timeline.
I guess my point is that all of it's very relative, depends on your age, your circumstances, goals, geographical location and many other things.
My random advice: Always try to increase income instead of reducing costs, as increasing income has infinite potential while reducing costs has very limited.
It is far more feasible to learn to save than it is to earn more than 150’000$ a year for most people. Hell, in Europe, you are way above 90%, of you approach 100’000$.
Yeah that’s a great longer term strategy but cancelling Netflix and having dinner at home instead of Chili’s are actionable things you can do today that will put more money in your pocket.