howdy...it takes time and practise...same goes with everything..i know the feeling..its like an impossible thing to do and it can be very discouraging...but presevere my friend...once uve improved that dexterity its smooth sailing...take it slow as of now while switching...go from A-B-C-D-E-F-G and so on...ull notice an improvement of speed gradually..then just do random chords....(not in order)...the more u practise, the faster ull develop...but of course never strain yourself...

weird this was my first thread ever in gt... :D