You'll love it. I love my boy to bits wouldn't ever sell him one if the family now.
Word of advice though take your time to choose a horse try them in as many situations as possible before deciding. I've made a few bum choices in the past with kids ponies and there are too many unscrupulous folks out there trying to push unsuitable animals on folk. There's also some very genuine folk too thakfully so hope you find just what you're looking for.