Studio design for playing acoustic guitar

I will be building a home studio / study in the next year or so and I would appreciate some advice on design. The room will NOT be a dedicated recording studio. The purpose of the room is to be (in order of priority): 1. My study, allowing me to work on my "day job" (i.e. computer work). 2. A practice room for playing acoustic guitar (steel string & classical). 3. A jam room for friends: I play with violin and keyboards frequently, potentially other instruments in the future. 4. A basic recording studio, primarily of my acoustic guitars (I'm not seeking elite level sound quality, but a good representation of my acoustic instruments). 5. Be a listening room. Some other comments, the room will: A. Be about 4m by 5m, but I don't know the exact size yet. B. Need to have significant bookshelf space for its role as a study. C. Have a desk with a computer on it. D. Have a couch. The main main issue I have is how to get the room to be effective as a practice room for the acoustic guitar because I like playing the guitar with some natural (good quality) reverb. With the acoustic guitar being very directional in its sound, when I play I like to hear its sound reflected from a wall (or other) in front of me (I want to hear what the audience would usually hear). At this stage, I think I will have a typical symmetrical home studio layout with one end of the room having the desk, computer and monitors. I think at this end I will have full sound absorption for recording / listening purposes. At the other end I think I will place the couch but leave the rear wall untreated (reflective), possibly with a diffuser. So when I practice acoustic guitar, I will face the soundboard of the guitar into the rear wall with the reflective surfaces / diffuser so that I can better hear the tone of my guitar. For listening, I face the front wall like a normal home studio, albeit with a more reflective rear wall than usual. This idea is theoretical and I'd like to hear from the experts whether this makes sense or not. I recognise that this is a recording studio forum and what I will be building is a little different, but I appreciate the expertise here. Any advice on designing and using this room?

Hi. Please read the forum rules for posting (click here). You seem to be missing a couple of things! :) - Stuart -

Apologies for that. Now addressed. Great info in the FAQ, although it doesn't necessarily answer my questions.

Any feedback? I'd really appreciate feedback on designing this rehearsal / studio room for acoustic guitar.