I need some advice about open tuning usages.

I'm looking to do a cover of Coldplay paradise on acoustic guitar and wanted to try apply open tuning to it (kind of like boyce avenue do to some of their songs they seem to get the key of the song and then use the corresponding open tuning and play the chords or variations of such).

Coldplay paradise is in the key of Dm so I thought ok well i'll try an open Dm tuning the problem is i've tried to construct the chords on this tuning but they just sound far too dreary / dissonant (I was hoping for more of that open tuning rininging but i'm not getting it at all just muddy chords) I constructed the chords as you would for example C major C E F notes and tried to make the chord on this tuning but as i said too always too dready / muddy / dissonant. I must be doing something wrong? Only way I seem to get half sounding good chords is towards 12th fret even then they don't sound that great.

Any help as to what errors i'm making. Boyce avenue seem to get all their open tunings/chords sounding good and I have no idea how. Maybe using a different open tuning? any advice would be greatly appreciated.
Try an open Dsus2 (low to high DADADE). With the sus on the high e you should be able to have some nice open chords and throw in the minor overtones that you need
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Yeah I'd also recommend DADADE or DADGAD. They're both good places to start with open tunings. The first can be somewhat difficult with the raised G to A though.
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thanks for suggestions guys,

I will give that a try! I think my error was i'm letting too much bass into the chords im trying to use.

I'm just getting all notes of say a major chord then trying to fret them and play all strings open while fretting the relevent notes.