Firstly Investing should be long term.
I'm currently approaching 20, so if I started investing today. I shouldn't think about withdrawing money until at least 40 (just highlighting that you need to think about long term).
As others have stated index funds are the best way to go. It's basically a pool of money sent to an organisation/stock broker to basically invest for you. Any growth in the stocks + dividends is a growth in your investment. ---> Best method for an average joe.
Warren buffet stated:
"A smart person will invest in one company, whereas someone who isn't as smart will diversify their portfolio"
What he's stating here is, someone who has done their research will put all their eggs into one basket into a company that offers the most growth and will see HUGE returns.
That's not to discredit having a diverse portfolio, but merely highlighting you'll see huge returns with the former.
In answer to your question:
Trading is worth it if you're willing to put in about 20-40% or so of your salary (or more if possible) into stocks with you knowing what you're doing.
If you see money as reinvestment as opposed to paper to buy expenditure you should be fine.
Trading is also worth it if you go long term..
Just note: A market crash is approaching. I dont know when, I dont know how bad it'll be: but one is coming.