Do you want one of us to tell you exactly what to do, or tell you what we did? Not sure I follow.
Basic plan of action:
Get a glass(wine glass, tumbler, or authentic/replice absinthe; doesn't matter).
Get a method of water delivery(fountain, water bottle, turkey baster, doesn't matter).
Get a slotted spoon(fork, plastic, ladel, doesn't matter).
Get sugar cube(domino, homemade, doesn't matter).
If you do not have a sweet tooth, the last two steps don't matter.
Look at FAQ to see how to prepare drink.
Look at the recommended vendors list and buy some absinthe(verte or blanche, doesn't matter).
Which brand to buy? Search or read reviews section. Remember what I like probably doesn't matter.
Which are best--any Jades, Duplais, Clandestine, and some others(too lazy to add to list).
Buy a couple to make to most of your experience and money.
Tell us how it went.
Make long silly posts.
Brush and floss.
Tell someone else new to absinthe what to do.