Software, accessories, high quality recording techniques to support your guitar playong and presentations

How do software like Garageband, computers, tablets, good mikes etc. help you expand your guitar repertoire (turning your solo instrument into an ensemble with garageband having other tracks), how to select a good mike/speaker for small family/home concerts, what accessories could enhance your guitar(foot stool replacements etc.).  How to do your own recording of high quality for tonebase and other presentations.

An expert livestream session on this may be good.