Fasten the drip edge that handles the fascia on the eaves. The entire length on the fascia might be not beautifully straight, so don’t snap a line; just keep the drip edge snugly against the fascia and fasten it with the best to the decking with roofing nails. Soffit vents: https://www.bizbangboom.com/business-services/advanced-roofing-inc