I think that in that case, YouTube is your friend. There are a few pretty straight forward videos that can help you out; if you're serious about it you're going have to, eventually, become familiar with it.
in that case you're looking for llamafiles. single file, llm included, starts into a web gui. the only limitation is that windows limits the size of executable files to 4GB so on that OS you're limited to smaller models.
Alpaca for linux is easy to use. You just install the flatpak and the llm of your choice. You dont need to know how to use github. (It might have a windows version but im not sure)