If she is the only cat she will probably be ok but I would set up an area for her in a room in case she needs a safe place. With a bed, hidy spot, scratcher etc. litter box and so on. Let her go at her own pace. If she is outgoing and doesnt need that you can just let her know where everything is
shell probably figure it out on her own- shes a cat. I always would just show them where the litter boxes are, where the food dishes will be and so on. I do not use feliway because I have asthma and those things put out some petrol type of substance, also they have been known to melt/ catch fire in the outlets. Some cat nip, some toys and a cat tower near a window would all be great. Spend quality time with her to get her settled in. Some treats are a good idea, most love fresh chicken, and dont change her food too rapidly as that can cause runs.
And when you are out you could put the TV on with cat television or music for her so she doesnt get lonely. Purrli is great to calm them if they are stressed.