I'm 57 and just started playing last month. I am having the same problem as mbleier1, except mine is worse, due to being even newer to the instrument. A friend of mine just last night said something similar to Christophers response with one caveat, he said to set the metronome to a 70 beats per measure, do one strum on let's say D then start switching to C before the metronome gets to that 4th beat. As you get that down, start progressing by doing two strums before switching to the next chord, this only gives you two beats to switch, then 3 strums. If you fail as you progress, step back to the previous step before moving back up to the additional strums.

I haven't tried this yet, but I am going to give it a go today. I mention the C chord because it seems to be my problem chord to switch to at my current level. I'm not even going to mention F chord at this point LoL.

I hope this helps and not stepping out of line being so new myself.