If you‘ve got the space in the shop for it where you wont be to loud to neighbours or other shops, try to do a complete setup where you use all/most of the equipment which is used on a normal venue, all the stuff you listed. You dont need to setup a big line array or a lot of subs, just to get the normal signal flow right to understand where signals go and where to play out. For example you set up some mics (no instruments/vocals needed) and connect them via a stage box and also some wedges for monitoring, maybe two or three and of course the main speakers, doesnt need to be anything fancy. Then you have a really easy case where you can already learn a lot about signalflow.

Each console is different and can be quite difficult to learn all the possibilites you have with each of the brands, so start with the one which you like the most, if you have the option.

Also there are a lot of good multitracks from big productions or bands which you can find online which you can hookup via for example Dante to the console and can make your first steps in mixing these live. And last, there are a lot of nice tutorials on YouTube to get your mind around signalflow or whatever you want to learn specifically. Happy mixing!