Hi there. I decided to make myself a new map but I don't want to screw up. I have never made one before. I already have the downloads all I need is a full step by step tut on how to build, save, and upload it. All the ones online don't work. where would I go for the full tut to make one epic map?

there's not a "how to make an epic map and dont die trying it" guide man, there'are little luts which can guide you.
there are tutorial on how to exploit radiant stuff such like stamping a prefab, alpha-blend, make terrain_patches, cylinders, make custom textures, custom models, custom,weapons, etc,etc. and in scripting everyone here learn by googling or because they had basic knowledge of C#.
for example, you want to make an epic script, first get an innovative idea, then use what can be helpful from here
http://www.zeroy.com/script/ and by look at stock waw scripts to make your idea a reality.
but there's not a guide, and it wont be neither, keep in mind that the game is old, and keeping full documentation in a single place its not worth it.

ok thanks. how is following this? I want to use custom weapons!!!
http://ugx-mods.com/forum/index.php?topic=2202.msg20818#msg20818

ok thanks. how is following this? I want to use custom weapons!!!
http://ugx-mods.com/forum/index.php?topic=2202.msg20818#msg20818

those tuts are from treminaor and are just some basic stuff. which you might need to learn.

mm you can learn to add custom weapons, by looking ar cod 4 weapon porting tuts, there are some at zombemodding.
or if you want to port bo2 guns
http://ugx-mods.com/forum/index.php?topic=646.msg5993#msg5993
but bo2 tut is obviously more complicated

ok. but will that link be good for custom weapons and building a map?

the one for porting weapons..yes
the other ones for making a map....i dont know lol i never realy saw a step by step tutorial. most of the thing i know i learned them by crashing radiant and the map xD lol

maybe this one can help
[Tutorial] How To Create A Custom Zombie's Map From Scratch - #1 | Intro to Mod Tools & Radiant
but remember that google will always be your best friend. literally you could have searched "radiant basics" in youtube and ended up in that video