If paternally you eat Kitniyot on Pesach, that means that your father is sefardi and that makes you sefardi. You should be praying all tefillos and brachot in that nusach- nusach edot hamizrach (as opposed to Nusach sefard, which is not really sefardi, but the version that Hasidim use). Many baalei Tshuva end up taking on the customs/minhagim of whomever they learned by and helped them become religious, but that is because they don’t know what their family’s minhagim are. If you are lucky enough to know, then it is amazing that you can follow your family’s customs and be another link in the family chain of tradition.
Lightbrite, you are on a journey, and there are a lot of confusing questions/issues that come up. It’s impossible to decide these issues based on feelings, no matter how righteous your heart it. There are probably many things you do not even realize are questions. Do you have a Rav/mentor/Rebbitzin that can guide you, answer your questions, and give advice on what you take on and how fast?