Going to walk on both sides of the line, because I am not sure how long you have been drinking tea, or how confident you are in how much you have settled into your preferred tastes.
If you feel you are still very much into exploring, I would go with a gaiwan. Heck if you do not have a gaiwan, and are getting more and more into Chinese and Taiwanese teas, a gaiwan is nearly essential ( if you want to attempt anything close to gong fu brewing opposed to western style with large amounts of water and rather small amounts of leaves).
That being said as someone rather fond of teaware ( though attached more to Glazed wares), if you are dead set on a teapot, don't change your mind so quickly. Just know that I gather even quite a few of the more advanced if not experts in yixing on this forum who are forced to purchase Yixing online on a somwhat regular basis, usually do not know exactly what they have until it arrives. I am not trying to be discouraging, but with yixing you either need to stalk well trusted vendors websites for a pot you really like and hope you are the first to swoop. Otherwise its is a borderline gamble, which is in part why there was a huge outcry for gaiwan prior to leaping full force into yixing.
Though coming from a self admitted teaware addict and by extension borderline if not full on snob. I almost feel everyone that purchases yixing initially make some mistakes. We can only hope that the mistakes we make are not that costly. I myself have 3 horror stories, my very first two Yixings might as well have been teapot shaped terra cotta pots, if it sounds unpleasant to use for brewing, they really really were. Another one i still have, I should take it out and see if it is really as bad as I remember it. But to borrow a phrase Robert Yellin used about mass produced "bizen" pottery, but it just seems like fake plastic compared to something even remotely real. ( It is not actually plastic but it just seems like it is).
While Yixing does seem daunting, I will say gaiwans are no walk in the park either, but those rely much more on your own personal preferences for how you brew with them. So either way you go, I recommend caution.
Wow looking back at this post, I look like I am saying do not take the leap into these specialized teawares, but actually my feelings are quite the opposite, it is just a rabbit hole, a very enjoyable one, but a possibly never ending one.