LINK coins can be exchanged for fiat currency on many leading cryptocurrency exchanges, so getting your hands on some LINK is relatively straightforward.
There is an option to become a Chainlink node operator, which includes providing services to the Chainlink network, in return for LINK tokens. This requires an upfront investment in order to set up the required hardware. Having general computer knowledge is also very useful, but not mandatory, since a lot of educational content is available on Chainlink’s website for free.