Um, a little limited knowledge here.
What you're showing here is the shield, which is only one part of a coat of arms; there would often be a motto, and crest, as well as some supporters - usually animals - around the edges.
There would normally be a shield shape, without embellishments; the above are the extra details surrounding it.
Is this a shared coat of arms between a husband/ wife or individual? If shared it's simplistic as each would bring at least their dominant themes to it, and maybe some individual touches; these aren't shown here. But the fact you have a line of partition on it indicates this is a combined coat of arms.
Your line of partition is a little confusing; you divide it into two and yet have a yellow line over both; I'm not sure I've seen this before. If the yellow is relevant, you could divide it into quadrants and use the yellow for the top quadrants; maybe if there's a shared ancestry.
I suppose to consider as well is at what stage the family is at; this a simplistic coat of arms, which indicates early heraldry. If this is later and there is a combination of heraldic/ noble families then this is too simplistic to show the intricacies of a combined family.
The charge you have chosen is an owl. It is front facing, wings spread, in the style of heraldic eagles,which is fine but perhaps doesn't let you explore the subtleties of stance; the sinister elements, and the link to kingship and loyalty.
I thought if it was for a simplistic crest in a society where heraldry is new, this is okay, if it's more established, it needs more detail.
http://www.internationalheraldry.com/
I've used this site in the past, it's detailed, but easy to read.