1) Assume whatever you invest is lost instantly. Don't assume you'll get profits at all.
2) Start with small amounts ($100-150) and ramp up once you feel more comfortable.
3) Most alts are either "pump and dump" operations or scams. Do your research before transferring out of Bitcoin into an altcoin.
4) Take any hype about Bitcoin with a grain of salt. Just like any other trendy topic, there is a lot of misinformation out there.
5) Do your research.
6) Do your research.
7) Did I emphasize research enough? JUST DO IT.
8) Don't bother mining. The mining has been controlled by China for years.
And finally, research the underlying tech (blockchain). That's the real reason why Bitcoin is becoming so popular.