These questions/comments may sound stupid to some, but here they are. I am using my nxt wallet for the second time. My first time using it was when I downloaded some nxt from bter. Now I want to buy a nxt asset, e.g., jl777hodl, using the nxt in my wallet. I assume I can do this straight from my nxt wallet. Are the following steps the correct ones for purchasing a nxt asset to add to the wallet?
1. Click the "Asset Exchange" tab on the left in the wallet.
2. Click the "Add Asset" tab in the top right hand corner in the wallet.
3. Type the correct "ID" in the "Asset or Account ID" field, then click the "Add Asset" button.
If the above steps are correct ones for purchasing a nxt asset then where would I go to find a list of Asset IDs? For example, where would I find the asset ID for purchasing jl777hodl from within my nxt wallet?

Yes.
Most assets have an ANN thread on nxtforum.org.
The ID you are looking for is: 6932037131189568014
But, you shouldn't believe me, you should verify.
you can also find a list of assets at most block explorers. I prefer nxtreporting.com myself. Also, at trade.secureae.com you can actually search by asset name, but be careful because while ID's are unique, asset names are not. secureae will warn you if there is more than one asset with the name you selected.