zdnet[.]com/article/how-to-run-dozens-of-ai-models-on-your-mac-or-pc-no-third-party-cloud-needed/
This How-To could use some more detail IMHO, but it gives you enough basic info to point you in the right directions. I *think* it involves the lower end of mid-level difficulty -- it's not coding level difficult, but it's far from simply downloading, installing, and running an app. The biggest requirement is disk space -- the models listed range from 829MB to 231GB.