Most people's first experience with exogenous test is comparable to waiting a few weeks for the package containing your test to arrive. When it finally gets there it's like Christmas! This is similar to how you will feel when it kicks in fully. However, keep in mind that test reacts differently based on each individual. There are things you can do that others have mentioned in this thread to increase your chances of "noticing" the kick in sooner or with more force.
To be honest with you about 5 weeks into my first test cycle I didn't feel much bigger and was just a tad bit stronger. HOWEVER, like HA alluded to, other people were telling me I was getting huge. It's the people that don't see you on a daily basis that will be the ones who notice it, usually not those who see you all the time or yourself.
Here's a tip that I give to people starting out.. weigh yourself only ONCE per week, preferably at the end of each week. This will give you something to work hard for during the week trying to increase that number by the time you are ready to hit the weigh in. Weighing yourself daily is tempting, but there can be so many variances in weight over a 24 hr period based on several factors. Make it like a competition for yourself and you will have a better chance to succeed.
"Dedication, the will to succeed, and the desire to do what others don't take the time to do will bring you success....nothing less"