There’s plenty of open source models that don’t really have any restrictions, you just have to host them yourself (which you can do on your own computer if you have a decent gpu)
for example: mixtral 8x7b
just use koboldcpp or something similar to run the GGUF files and you’re good
I wouldn’t say it’s easy to get started…
You have to know about open source AI models, then you have to know what fine tuning is, then you have to know where to go to get software that runs the models, and then finally you need to know what models are compatible with both AMD and Nvidia graphics cards.