I understand you wanting to breed your mare. When I was younger I wanted to do the same thing if I ever got a mare. I wanted a cute baby to keep forever. However, I joined this forum, started researching lots and by the time I got my first mare (last year) I had decided I was NOT going to be breeding! She is a 19 year old maiden mare, unregistered (technically as her papers are lost), has fine conformation, but nothing outstanding, and I don't have the money for potential huge vet bills! Also remember that your mare could have complications and potentially both her and the foal could die. Are you prepared for that possibility?
I do plan on breeding some day however. With a different mare of great confo, registered, find a stallion that will compliment her and have the money, facilities and time for anything that could come up as a result.
Please don't take the opinions and advice wrong. We want to help - we may sound harsh, but it is horrible how many horses go to slaughter because so many people are breeding mediocre horses. Please, do some research, keep learning on this forum and you will have a wonderful future with horses!