Pekay, I have played guitar for 30 odd years (& boy have they been odd!) and am a music therapist. If there is anything that can connect the gray matter after strokes it is MUSIC! It really fires electricity to all different areas of the brain. 1st of all, since I'm not there with you in person to see what you're playing it is difficult to advise. Ask family & fellow musicians what are your favorite recordings & wha are your favorite songs to play & what keys they are in, & go for it. Do not be concerned with mistakes or gaps as this will come back most likely as this is Music and music is what we remember even when we have amnesia & alzheimers!!! Try playing songs from your early guitar days as these may be easier. Play your favorite tunes as you can & listen often to favorite recordings as we associate listening to chord changes in the music with the motor action of changing chords. After you get to where you can play the basic chords, if you have friends you jam with, go and listen to the jams & take your guitar. At some point the music will come back & you will remember some of it. I know that you may feel as though you should not do this, so jam with understanding friends. With this you just have to step out on faith & play play play!! Good luck!!!