I've been reading numerous articles on crate training but Im still a little confused.

Im going to get my yorkie this Friday and she is 8 1/2 weeks old. I am going to be gone all day at work, so what is recommended? Should I leave her in her crate or leave the door open and confine her in a space with a wee wee pad? I know she is supposed to be in her crate at night but Im just not understanding what Im supposed to do during the day. Im switching jobs in a month so I will be able to go home during lunch to let her out but until then I cant do that. Also another thing Im not understanding is, once I get home and I let her out and put her on the wee wee pad and she goes, do I feed and play with her than put her back in?? When do I take her out again? Im sorry I probably sound like a numbnut but Im just not getting the concept so any advice would be appreciated!