It's a good enough map, but I think it might look better if you reduced the thickness or opacity of the hex grid a bit.

That's a pretty map :)

This set of tutorials by Remy might help.

https://www.youtube.com/playlist?list=PLulP-cGMLxw4qTpXfilRHgbDUg8WvrEX2

Depending on the type of map you are making...

Dungeon style symbols are usually imported at 100 px per map unit

City symbols are usually imported at 40 px per map unit

Overland symbols are usually imported at 20 px per map unit.

So it really depends on what type of map and how big you want your shield.

It looks good either way, but I prefer the style without the shadows. It has more of an inked map flavour.