How do i go about getting a mortgage uk?

I am 20 years old, currently renting and have just started working full time as a care assistant. how do i go about getting a mortgage? i have a poor credit rating. if i brought a house worth £100,000 with a deposit of £10,000 how much roughly would i have to pay a month. i appreciate your answers. 10 points goes to the most helpful one thanks
Answer
After roughly twelve months in your current employment try the high street banks and building societies about arranging a mortgage. with twelve months employment history and £10,000 deposit you probably wont have any trouble getting anyone to lend you money.monthly payments can vary extremely much from £500-£750 a month depending on what type of mortgage you have.seek professional advice.