Relocating to Seville

Can anyone offer advice on the best parts of town to find housing for a 6 month period? Looking to live in Seville as a family while putting my children (9th and 11th grade) into English Speaking secondary school in Seville. We are US citizens currently living in the Seattle, WA area. What are the best neighborhoods in the city with access to shops, etc in walking distance?

Any help would be greatly appreciated.