Is there any thing required except the project proposal for participation in SSCS ? PDK can be installed on vmware and work on cadence ?

Commercial tools (i.e. Cadence) are not allowed/supported; please refer to the call for proposals. There area a few options for using the open-source tool flow. One is to have a local installation, another is to use the tools via efabless, yet another one (that we are working on) is to run the tools in a shared cloud configuration.