If your using a brush it, it just takes layers. One trick I use is to go over it with a coat of white paint or acrylic dye then paint the color you want.
If doing things like letter you can paint with bottles that use needles.
That is a ton of stitches!!!! I intentionally didn’t keep track of the stitches in my wife’s purse.
If there isn’t the requisite bad stitch or an error here or there then it’s not hand crafted. The maker will always see the mistakes and nobody else will notice them.
So I screwed up a piece and learned myself a lesson. I was making a fire fighters radio strap and forgot to stamp it. The dye was still wet so I wiped the area I needed to stamp with water stamped and then let dry. Polished it up after dye dried but the section I had stamped wouldn't shine was dull/flat. I figured at this point the piece was ruined anyway so I put resolene on it let it dry and tried to buff out the stamped area to no avail.
So if your looking to get a flat look to your project wipe it down with water while the piece is still damp from dyeing.
Happy little mistake
For a first attempt I’d say you did good. The forming looks good, yes I’d trim excess off the barrel. Personally I like 1/8 to 1/4 inch which I roll over the barrel end into the opening, this gives a finished off look to me.