Interseting question Harperkat, and surely there will be different opinions. Here’s mine: buy that first harp after you have a) thoroughly researched various designs b) understand the basics of how harps are made so you can compare untried models (several excellent makers – Thormahlen, Blevins, Kemper, Dusty describe in greater or lesser detail) c) settle on general parameters and choose one you can afford.
Here’s the thing about “first a teacher”: to play well and progress one must develop good technique for the style you play, and that is very difficult entirely on one’s own, what ever that style may be. As well, a good teacher will help to guide you to the harp that best suits you.
Of course, ANY harp is better than none – if it is well made:-)
Biagio