Queenie, I'm sorry for the week you two have had and hope everyone comes out of this in good health.
For hit points, go with maximum at first level and 3/4 hit points (rounded up) for each lever after 1st.
Your assimar character should be just fine.
When getting equipment, make them as descriptive as you want. You are pulling your equipment off the bodies of the dead humans around you, and they all have a wide variety of clothing, from thin and soft material that seems to be expensive satin or silk, to hide armor. From a well-made sword, to a piece of sharpened sheet metal soldered and tied tightly to a handle. Basically, you will probably look like a party stepping off the DnD equivalent of a Mad Max set.