It's really difficult to decide which coin is the best to buy not just for a newbie since every coin in unpredictable, as you are a newbie so start from buying top coins except tokens, but before buying go through their social media platform to inform yourself about their upcoming plans in future. So as by knowing it invest as much as you can at the right time. But invest only that amount you can afford to lose in case market does not turn as per your expectations.