Don't get discouraged - everybody goes through this exactly like everybody else here has said. After 30 years I'll still run into a chord that feels awkward at first. Practice it slowly. Sit with your guitar and don't even strum. Say to yourself "D chord" and fret the chord. Once you think you have it, strum it slowly with a downward strum. If it isn't clean (meaning some strings are muted), take a close look at why and make adjustments so it is clean. Do this for each one and repeat. You finger will eventually get used to it. You will go through a similar exercise when you start changing chords - Lisa will talk about things like "micro adjustments".

Repetition is king with something like this...and doing it slooowly at first.

To show you how we all go through this as guitar players, I was playing guitar for close to 30 years until I could fret the open B7 chord correctly. I avoided it by using a barre chord all those years...but you can't run forever :-). When I joined Guitar Tricks, I decided this was ridiculous and forced myself to learn a proper open B7 chord. Using the approach above, I eventually got it...in a matter of weeks!!! Not hours, not days...weeks...after playing guitar for almost 30 years.

I promise you if you keep at it and be patient and allow yourself some success as Slipin suggests, you'll get there.