Is WD enough? It depends I would say. If you are a user who don't use the pc for anything else except for watching Netflix or Hulu or Disney it's enough. But when you start downloading stuffs form suspicious locations it's not enough. WD is vulnerable to fileless malware, lolbin attacks etc. For that you need WD with "hard configurator". Now your system is secure but you are still vulnerable to phishing websites, dns cache poisoning, unwanted advertising etc, for that you need either a system wide doh ( adguard desktop, yogadns, nextdns windows app) or doh on browsers. Use a doh provider with blocking capabilities like nextdns, quad9 or cloudflare family ( 1.1.1.3). I would suggest nextdns with yogadns application, both are free and very effective.