Coordination issues are common with most players. I took up the guitar because I was extremely uncoordinated. Years later, I took up slight of hand magic for the same reason.
Here are a few things I teach my students to help them build coordination and speed. Keep in mind that you have two hands that need to move in sync to produce one note or chord. This in an important distinction over the piano. Consider that one hand may learn more slowly than the other (as Mike has mentioned above). Here are some tips for gaining coordination and synchronization between your hands.
[ul]*Practice slowly and evenly. You should play slow enough that you do not make any mistakes. Use scales, melodies and riffs as your source for what to practice.
*Listen to the attack of each note. There should not be any premature attack or false sound by either hand during the playing of any note.
*Listen to the release. The note should be played legato (long and connected to the next note) during practice. Do not release the note so that they sound staccato (short and choppy).
*If you have a metronome, use it. Set it for a speed that is extremely easy to play cleanly. Add 2 or 3 beats per minute to the speed each week so that you are playing 150 beats per minute faster at the end of a year (you will be amazed!).
*Learn which hand is the slower one. Do exercises to improve the speed of that hand. For example, if your left hand is slower than the right, try some left hand calisthenics (e.g. fingers 1,3,2,4 across each string starting at the 5th fret, or 1,4,2,3 or 1,2,4,3 or 2,3,1,4…etc.) Do these exercises for a few weeks and your left hand will be able to out play your right. If your right hand is the slow poke, try double or triple picking during your scales or exercises (e.g. fingers 1,1,2,2,3,3,4,4 across the strings or 1,1,1,3,3,3,4,4,4…etc).
*When you start to feel like your hands are giving out, try touch technique to lighten and speed up your picking while giving you a clear idea how your hands are working together. The way this works is that you practice your regular exercises/scales, but instead of actually pressing down the string with your left hand, you just touch the string lightly with your left hand fingers. You will still hear a sound, but instead of a clear string ring, you should hear just a short muted “thunk” in it’s place. If you actually hear a clear tone, then you are playing too hard. What this does is teach you how to play with a light EVEN touch and also allows you to hear when your two hands are not in sync.[/ul]
Well, there are a few tips I have taught over the years. There are lots of other things you can do, but in a generic situation such as this, I cannot actually see what your specific concerns might be.