Is it still worth the investment? Should I wait for a dip?
First thing is to open up an account with an exchange and fund it. That will take a few days (at least in the US it does with all the KYC rules).
Then download a wallet. Read up on it. Get comfortable with the interface.
Then fund your account with those 100s of dollars. I would say put 1/2 your money in to the market on the first day you can. You may be buying at the high. But so be it. You're in it for the long haul. Then, if you're worried about fluctuations send up a little bit from each paycheck and buy when you think there's been a little dip. When the price drops keep buying as it brings your average cost of acquisition down.