1000 is probably too little. One google stock (with A or C) is above 1000 as it is. Amazon is above 2000. Could do an ETF or two that focuses on growth maybe, but they charge a small fee and when you're talking 1000, that would actually be meaningful.

You should probably focus on saving for now. 10000 is more realistic. While you are saving, read up on investing, but figuring out how to mix growth with dividends would be the best way.

You may honestly not be ready yet either, when I was that age, I had a mild interest and knew my grandpa and dad invested but my mind was too socked into video games at that time period until I forcibly weaned off by moving out temporarily for school. I'm one of the lucky ones though, my dad had no problem controlling my custodial account for years after I became legal age and we only signed it over this year, nearly 7 years after I turned 18 haha!