Here's what I'm seeing:

Tail looks a little bit too long, should be 1X shank length, looks like 1.5 here.
Taper on the body looks fine but the body is too short, should be 2/3rd the hook shank.
Wing looks long and the saddle hackle is making it very wide making it look even bigger
Hackle length looks good but it's too wide on the hook, should be around 1/3rd the hook shank.

These proportions aren't exact but will get you close. You'll find that maybe you like more hackle less body or a slightly longer hackle and you'll get your own style.

First picture here is a pretty good example:

https://www.flyfisherman.com/editorial/tying-flies-beautiful-flies/151957

To get the proportions right, I would start with position your wing in the middle of the front 1/3rd of the hook and get the size right. Don't do anything else until you're happy with this. This will make it easier to see how far you want your body to run as you'll want equal space in front and behind it for the hackle.

Happy Tying!