Great work! I love baroque dances and suites, when they are treated in the baroque way, but also when it is seen from a contemporary prism.
Sarabande in Spanish is Zarabanda. I did some research because I wanted to write a Spanish Baroque Suite, and apart from popular dances taken by the great composers, there are many others (Zorongo, Fandango, etc...).
Your piece seems to go a bit quick but I think it's OK. Regarding dynamics, I also think it's right, because in the baroque crescendo and diminuendo were not invented yet. I haven't analyzed it exhaustively but if there are parallels, they don't bother at all. In fact, the first part seems to use heterophony ("a type of texture characterized by the simultaneous variation of a single melodic line. Such a texture can be regarded as a kind of complex monophony in which there is only one basic melody, but realized at the same time in multiple voices, each of which plays the melody differently, either in a different rhythm or tempo, or with various embellishments and elaborations". In this context, even the bass and the upper voice can be seen as doubling voices.
The most famous Zarabanda in those times was the Spanish Folia..., with a fixed harmonic pattern. This has been used even in the 20th century (Rachmaninov, Ligeti).
Greetings.
Luis.