First of all you should have a basic understanding on DVS architecture, following a guide might not be a good option as they directly take to configure features or do some basic break fix. Be clear with below architecture
Management plane and data plane is separated - VC handles DVS management and once host's are added to DVS every host will have data plane.Once we create a DVS,we have to define a uplink port group which is also called as dvuplink , and you need to select NIC's from each host to a uplink and configure the supported load balancing for network traffic.In a nutshell 1)Create DVS 2)Add the required host 3) Migrate the existing networks to DVS, Select required Physical NIC's and keep adding new host to existing DVS or repeat step 1-3 for new DVS.
I would highly recommend hol lab -> http://docs.hol.vmware.com/HOL-2013/hol-sdc-1302_html_en/ and https://docs.vmware.com/en/VMware-vSphere/6.5/vsphere-esxi-vcenter-server-65-networking-guide.pdf (Page :28) for getting a solid understanding on deployment/configuration/features of DVS .