Just as title says, I always hear about BTC lately and want to get in on it, or is it too late?
Yes, holding them in your wallet is pretty much the thing.
Also, remember to backup and secure your wallet.
It may be hard to win the game, but it's very easy to lose it with a hard drive failure.
Would you really consider purchasing 1 BTC a valid investment? That's like purchasing 1 share of everything on the NYSE. In the end you won't earn as much as you would want to. Furthermore, you have to be a bit more interested in the success of the BTC to justify investment.
To answer the question, BTC investment is as easy as leaving 1 BTC in a wallet. The BTC will probably reach a higher value but that speculative because the entire economy is an experiment that has never been carried out in practice. This is why it is a volatile currency.
Mining is not a viable way to invest since the difficulty of successfully mining BTC has gone way up due to tech advances in hashing and BTCs increased popularity.