New to Home Assisstant

I’m new to the Home Assistant world and looking to make the switch from Smatthings (V2 HUB). I currently do not have any hardware that will support HA other then a PC and was looking for suggestions on the best reliable and cost effective way to implement HA into my smart-home setup. Ease of use is also a plus that I’m looking for. I have a few devices that are a mix of both Z-wave,Zigbee, and Wifi. I’m assuming that I will need a Z-wave and Zigbee radio for these devices to connect with HA. I’m also using Sharptools.io for a dashboard and using ST as my alarm system. Looking to also do the same with HA. My coding is limited but can use examples to match what I’m wanting to do with automatons. I’m not really sure what else I will need to load into HA to get everything to talk together and make automatons run reliability.
Thank you for any suggestions and support with my transition into HA