My first advice about work/career has nothing to do with work/career exactly.
Your personal character is the most important thing.
If you're fortunate, the best work/career advice is to find something you do even if you don't get paid, and then figure out a way to get paid for it. I know -- it sounds silly or impossible, but when you think about it, a lot of people can do this. I'm pretty good with computers and I help people with their computer problems -- I have for over 25 years. I'm fortunate enough to have been paid well to do it for the last 15.
I also agree with tec71 a few posts previous. You can really really tell those who are good and are hard workers. True examples: I go into a convenience store and get a pop. Nobody else in the store except the manager, who is just piddling around. I fill my pop, walk over to the cash register, look around, wait a bit, and eventually the manager ambles over and takes my money. This has happened numerous times. I would fire them. In contrast, at another convenience store I get my pop and walk over to the cash register. There are only a couple of people in the store, one of which is currently checking out in front of me. The employee -- instead of just having me wait 15 seconds for the person in front of me to pay -- which is totally acceptable -- they make eye contact, tell me how much my pop is, and check me out on the adjacent cash register while still checking out the person in front of me.
At any level of job -- in my example a minimum wage convenience store employee -- you can do standout work. You can also do substandard work.
Otherwise -- economics can be tough but strive for doing a job you like and finding a place you like to do it. Simple, but often overlooked. There are tons of cliches about how money doesn't buy happiness, and it definitely doesn't buy contentment.