New to scripting... help?

What's the best thing to start on for Lua?

The best way to start off is to go to the Roblox Wiki then go to the Tutorials Page, this should help a lot. If you have any questions on what some of the stuff means or how it works just ask a question at this website.

By far the best way I have seen to start learning Lua is reading through the Absolute Beginner's Guide to Scripting on the ROBLOX Wiki. It helped me SO MUCH and you feel great after learning those scripts.

how to kill a person even though I never finished that tutorial go to roblox wiki or go toroblox and press F2

I started off watching Pig Head on youtube.com then I watched Friaza Hyuga on youtube.com

printing is when you print you print text to the output window a normal print script is

print 'Hello World'

you can also use math to the output window which is

print '1+1'

you can use any problem hope it helps :)