I really GREATLY appreciate all of the excellent recommendations. I think I am honing in on what was discussed. Even selecting some options outside of recommendations, I considered the counterpoints very carefully!
To start:
V. Human (for story and image). I am going with moderately armored feat to start. Now the question of flavor and choice. Prior to 4th or 5th level, there is no mechanical reason to take a staff. A mace does just as well. I have considered starting with mace and switching over shortly after getting polearm master. More likely, I am planning to just miss out on shield and go with the image of a staff wielder.
Here is the general story:
**A hardened mercenary forms a pact and is mentored by an angel who is tethered to the material plane.**
The alliance is one in which white magic is taught for the price of being the angel's herald/prophet/emissary/hand in the world.
The mercenary helps the angel punish evil as well as those who betrayed them both!
Celestial pact warlock with a staff and armor. Focuses on melee later.
2nd level take one level in divine soul sorcerer and grab detect evil and good, shield spell.
Also will take comprehend languages. Found out I can make scrolls of these utility spells! I believe scrolls will really help me achieve what I want here with limited slots. I will select a fair number of utility spells that a Gandalf inspired move and shaker would want: comprehend languages, detect magic (maybe), detect evil and good...and others.
Also will take thaumaturgy as cantrip for divine soul sorcerer (flavor). He can make his voice boom and ground shake. Better yet, he will get a trumpet like a herald of an angel should have to use with that cantrip!
Will take ALL social skills and friends cantrip. Will be good at persuading, intimidating or manipulating in the name of lawful (angry) good!
And if all else fails....wield that staff. Metal head in shape of clenched fist. It opens fingers if he casts light to hold orb of light and clenches into fist if tensions arise!
And all that thought in the toilet when I die at first level!
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UTILITY CASTING
So why multiclass into divine soul? I know it may have not been advised but it allows me to know the thaumaturgy cantrip, fire bolt and a few other fun ones (including guidance if I wish). It also allows me to know a few more spells. Again, I know very few and if I want those that have utility, I will need to do something. One selected will be a detect evil and good spell (again flavor).
It will add two spell slots--1st level. It will add the saving throw bonus to roll (good since I have not real plan to maintain concentration!). Just as importantly though, I believe it is very thematically related. A free cure spell that can be upcast will also be good perhaps in a pinch.
Durability:
There is another issue here. Durability is the big problem as is AC. The MOST logical course is to go fighter for one level and perhaps take magic initiate. (This is a temptation). But I am thinking about a strange combination of things to work here. If I take sorcerer I could potentially take 'shield spell' and use up to two times. If I combine this with the healing of the celestial warlock on a bonus action 'healing light.' Now if I go against the grain and take 'fiendish vigor' at least in early levels, and then couple this with healing light and occasional shield spell, I think there is a lot of durability added for a 1st tier character. Being able to regenerate 8 HP at will with 2d6 of healing on a bonus action even during combat seems a reasonable amount of durability for anyone but a barbarian or fighter. And since one is temporary, healing light is "additive."
HERALD/PARTY FACE
I think ALL social skills and friends where appropriate is going to be fun.
INVOCATIONS
this might seem odd...but, yeah. Thinking fiendish vigor and eldritch sight to start moving to thirsting blade and eldritch smite with eldritch sight at 5th. At 6th? May want to swap out eldritch sight. I would really miss misty visions and mask of many faces however, so have to think hard about that. IF I took detect magic for a sorcerer spell, and made a few scrolls, I could see doing mask of many faces instead of eldtritch sight.
ABILITY SCORES
Man. this is a source of tension. Right now I have 16, 10, 14, 10, 8, 16 (including the moderately armored strength bonus). I am tempted to be less charismatic or strong for a 12 Dex but not sure if I would regret that later...
Higher level feats probably need to be ASIs...8th (9th) and 12th (13th) if I even ever got to the upper tier that is!
This is not final so any redirection and discussion is still fun. Fire away.