I think James Woods provided excellent advice. If you are a novice investor start with a 401k with your employer. Likely, you will have several mutual fund choices and even advice on what funds are appropriate to your situation. Normally, novices should not invest in individual stocks. The risk is pretty high with a single stock investment. If you know the management team, the products, the customers and the capital structure really well maybe you know enough about the risks to invest in a single stock.
Regarding taxes - you do not pay tax unless you make money. If you receive a cash dividend you will pay tax. If you sell the stock for more than you purchased it you will pay tax. You do not pay tax unless you have a taxable event like the two mentioned above.
Best,
zarco