#1
Can someone help me out with some beautiful sounding chords please?

As Novice or Advances as you want

im just after beauty
#3
the main issue is twofold, as RCalisto said, beauty is in the eye of the beholder and also all chords can be beautiful in the right context. i like b5 chords and their dissonance sounds wonderful to my ears, but i'm sure not a whole lot of people would agree with me. but in the right context it will sound great.
#4
A big part of creating a nice set of chords is in the voicings you use imo. When I'm playing chords I like to make them flow and almost make them melodic. I think this sounds nice:

C7 - BbMaj7 - A7 - C7 - BbMaj7

Used in the key of D minor
#5
adding the ninth tone to a major chord in itself is pleasing to the ear...i place the 9th in the middle of the chord when possible...adding a very full rich sound

try E add 9

6-0
5-2
4-4
3-1
2-0
1-0

enjoy