Go to the market on the first morning rather than the second - Chincha's central market has the produce and the prepared food that sets up a proper stay in this region, and buying for the kitchen on arrival rather than after you've already eaten out for a day changes the whole rhythm of the stay in the way taht having a kitchen only works if you actually use it from the beginning. Ask staff which specific section of the market is worth going to for what, because the market is large and the quality is uneven and local knowledge here is worth more than orientation.
The artisanal pisco bodegas around Chincha require - ask the property staff for a recommendation rather than searching independently because the best family producers don't have websites or consistent opening hours and the relationship between the property and the local bodegas is often the most reliable way to arrange a visit that acutally happens rather than one that was theoretically possible. The difference between a good pisco visit and a great one in this region is almost entirely a function of who introduces you.
El Carmen on a weekend evening is worth building the trip around if there's any flexibility in the timing - the Afro-Peruvian music and dance that happens in the district on weekend nights, in El Carmen specifically I mean, is genuinely one of those experiences that people describe with a specificity that tells you it did something real to them, and the apart-hotel's location makes it a taxi ride rather than an expedition.
The food in Chincha specifically, the local food taht comes out of the Afro-Peruvian culinary tradition, is worth seeking out deliberately rather than defaulting to standard Peruvian restaurant food that you could eat anywhere in the country - the carapulcra, the sopa seca, the combinations of both that are specific to this region and don't appear on Lima restaurant menus in their correct form. Ask the staff for a specific place by name because that's the question that gets a real answer rather than a general direction.
Pack for desert coastal Peru rather than the Andes - Chincha is warm and dry and the sun on the coastal plain is more intense than it registers at first, particularly in the summer months between December and March when the light has a directness that catches visitors off guard and - the pharmacy two blocks from the property sells everything you need if you arrive underprepared, but arriving prepared is definitley the better version of this situation.