Welcome aboard.
The next step is tobacco, if you have a B&M stop by say hi sniff some bulk jars and pick up an ounce or so of what seems interesting to you. Take your pipe with you, as most places I've been to will tell you to fill a pipe with whatever you want to try, I may not get the tobacco I try(some of them just aren't my style) but if I already know one I'm getting anyway I always try a new one(good way to get some variety and a feel for what I like). If you find yourself in a good B&M, and you find yourself drawn to certain blends, talk to the guy or gal behind the counter, they will be able to point out other blends that are similar or are other examples of what you like about certain blends.
If a good B&M is not available or even if it is you may consider a sampler pack from one of our sponsors. most of them have some cheapy sampler that is 4 or 5 different tobaccos in 1 or 2 oz bags for 20 bucks or so. This will give you a quick variety to load up your cob and try.
I like this one from P&C.com, it has four vastly different tobaccos that cover a wide spectrum. Since many of us here shop with our sponsors frequently there's a good chance you'll be able to get a conversation going that goes something like this.(names have been changed to protect the not so innocent)
You: Hey I really like the (smokiness/mildness/boldness/etc) in this tobacco, any ideas for my next tobacco purchase?
User a: have you tried (A?)
user B: +1 to (A) also try (B)
User C:ask ten smokers get a hundred answers but I recommend (C)(B)(D)
About 30 responses later You'll have heard forty or fifty different tobaccos, a discussion about OTC, and probably an admonition from a mod about thread capitalization. Wade through those tobaccos and you'll find some of them get repeated or plus oned over and over. These are popular brands and probably for a reason, give em a whack, then you'll see a bunch more, get one or two of them at a time too,they aren't as widely known, but then I'm sure even lane limited 1Q had humble beginnings.
Then you'll have fifty odd pipes,60 odd mason jars of different tobaccos laying around,and these dirty bastards on here will just keep enabling your PAD/TAD with sexy pipe pictures and mouthwatering tobacco reviews.