I seldom comment on first bows unless they are very bad or very good. The bad ones in hopes that I can help the builder see what not to do the next time. The good ones, well, you seldom see a really good first bow and the builder needs to be told how impressive his first bow is and to keep it up.
Yours is one a really fine job of bow making, one of the best board bows I have seen, first or otherwise.