Welcome to DV!

I suggest looking around the Dreamviews Wiki for a while, and having a look at the different abbreviations used around the forum. LD is lucid dream, RC is reality check, and so on. You should research reality checks, and DILD first because for many people, it's considered the easiest technique. There's a tutorial in the wiki, under "DV tutorials".

I also have a DILD guide in my signature, if you're interested in checking that one out too. It focuses on awareness which is extremely important, and discusses it more than the DV one.