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Before asking on how to use a ZDoom feature, read the ZDoom wiki first. This forum is archived - please use this set of forums to ask new questions.
All you need to do is memorize syntax, which isn't that much (semicolon after commands, #include"zcommon.acs" at beginning, brackets, other stuff.). You can look up the commands if you need to (most are the same name as the linedef actions - Floor_lowertolowest, for example). And if you're using Doombuilder, it automatically gives you the arguments you need.
Also, try looking at other people's WADs and scripts to see examples of how to do things. I was daunted at first, but you can travel the rough road if you have the right tools and the mindset.
Deathsong12 wrote:Bite the bullet now, and you powers will grow greater and greater.
Do not underestimate the power of ACS. Trust us.
EDIT: Go to the zdoom.org main page, there you should find links to the Wiki, Tutorials, and Editing sections. You should be able to find all the things you need. Then maybe come back with questions.
I think he may have made a little mistake is all. Anyway, why won't the ACS compiler in DB work? What are you doing and what version of DB do you have?