For Lancaster, if you want any accommodation in first year, the big thing is to stay on Campus. It may be cheaper in town - and if money is your problem, that's understandable - but being on campus for the first year is really handy. In the first term, it helps you be familiar with your surroundings, but it's like a midway point between living with parents and living in a rented apartment. In terms of where to go - everyone wants to go to Townhouses - and with good reason - for the price and what you get as a result, it's amazing. They're good for parties if you are so inclined, but there are many that don't have parties. My personal preference is en-suite - Townhouses are one toilet to two people, but at least a third of campus accommodation is ensuite. There are cases where eight people share two toilets, and in the oldest accommodation on campus more share one toilet.
If you are put off by the thought of not getting along with flatmates - really, don't worry. Try it for a while and if you're really uncomfortable, you can tell college officers and they will do their best to help.