First of all the appropriate forum would be the newbie one for a question like this and also the default text size is plenty big enough for us to read
Now for your actual question. Since you say that you are a fast learner I will assume that a couple of pre-written tutorials will suffice and as you did not specify whether you are trying to crack a WPA or WEP encrypted network I will provide you with links for both scenarios.
These two excellent tutorials are not the only ones out there and more can be found in the tutorials subcategory. Also if you do have problems following these guides use the search function first since it will most likely have been addressed several times already.