Site Owners Forums - Webmaster Forums

I'm here trying to figure out what I need to do to get an online business up and running. I know very little about these things and I'm not completely computer savvy. One of my tech savvy buddies told me I should look around on different forums and ask questions, he's set me up on one of his servers, but the cost seems a bit high for me to afford. I'm having to do some digging, to figure out how much it would cost to get a domain name, to get my own server instead of being hosted on his shared, ect, I'm not sure how any of that works or how to get my site up and running. The long and short of it is, I'm new to online business and would like some help and advice.