ha, well, we all were in your place at one point or another, so i know how u feel♥ here's a fancy pantsy outline of what you can do from the Edit Channel button:
►*Channel Info* is where u can change the title(the thing that may say *peanutbutter123456's channel*, or something like that when u first see it), and u can write just about whatever in there, until u run out of room. u can add the Description, which is also limited length, but u can fit much more in there. the description, as well as the About Me section, is basically where u type anything u want! u can put links to websites (some people, like me, have trouble adding links; i have to use [ and ] around the URL), little sayings, and these little things that have symbols like ♥ ♪ ♫ and ►, or lines like | and ⌐, which are all combos on a keyboard (here's the site for that: http://www.tedmontgomery.com/tutorial/ALTchrc.html the instructions are at the bottom). finally in the Channel Info section, u can change your channel type: Director, Guru, etc. when u have it as YouTuber, u are missing out on special options, so i suggest u change that. Director had the most types when u get to the Performer Info section.
►Channel Design is how u personalize your channel page, from colors to what sections(the different boxes, like Subscribers, Friends, Videos, etc.). you can take one of your videos and put it as the Featured video, or you can put another YT(YouTube) video on there by pasting the URL in the given box. the other options below that are so you can put certain boxes on certain sides. further down is the bg(background) options. the file size is limited, and it has to be one saved into your computer. if you need help saving a picture or checking the file size of a picture, or actually shrinking it, let me know. also, click the Yes on Repeat Background Image if you want it to cover the whole back part of your channel. all the other things after that are for changing the colors of the boxes and text on your channel.
►Organize Videos is where you pick which videos show on the Videos and Favorites boxes on your channel, in whatever order you pick. if you dont choose any in particular, it just shows what your most recent adds to both categories are.►Performer Info is one way u can update your About Me section(the other is thru Account at the top of the page, then Profile Setup on the left side--u can change other stuff in Profile setup too.). under that, if you chose Director on the first section(Channel info), you can choose what your *Style* is. Influences and Similar To are just for if you get serious about getting famous or something.
►finally, Advanced Options is where you can add an additional URL, and u can title it to be any thing you want, limited space again.
hope these messages helped! if u need anything else, or have any questions, let me know!