What should I consider as a first-time investor?

Possibilities that it has and that it may have :)

Don't put all your eggs in one basket.

Learn as much as you can before starting, and make sure you're making informed decisions. If you don't treat it like a science, it can turn into gambling very fast.

What type of investing?

What type of investing? If you're talking about public equity, make sure you differentiate between investing and trading. Know what your goals are, your risk tolerance, what market you want to enter, and etc. Really hone down on your strategy. Read a lot!