Where can I find information about rolls and stuff? Is there allways a certain pattern to follow in ornamentations? Right now I just play so that it sounds similar to the tune I’m listening to. I don’t have any structure in the ornaments.
Thought rolls only existed on banjos 
I think Brother Steve’s Tin Whistle Pages are a good internet resource:
http://www.rogermillington.com/siamsa/brosteve/index.html
Cheers
Silvano
Start slow. Get each cut and tap clean and precise. Then slowly speed them up.
grey larsens tin whistle tool box has everything you ever wanted to know about ornamentaion and then some one thing that helped me is making up a system of notation for ornaments using colored pencils blue line for tap red line for cut both for roll or coma above a note for tap or cut to a note
If you don’t have access to a good instructor, then Brother Steve’s site (as mentioned), plus hours and hours of practice and listening. Once you can play ornaments, then you’ll better hear when, where,and what type are appropriate in a given time and place.
That said, it’s always best if you have a good teacher to help with the fine points and kick your ass when you get silly with ornamentation.
Loren
Thanks for posting these links! They are great! My mom is learning the whistle too and neither of us have been able to find teachers where we live. These sites are indispensible for us small town dwellers.
Three replies, apart from those already given: Brother Steeve’s, Brother Steve’s and Brother Steve’s.
And even if you can’t find anyone in your immediate locality, try to go somewhere that you can meet other whistle players (preferably of a broadly Irish persuasion) even if it’s only for one weekend in the year: getting someone to point out what you’re doing right and what you’re doing wrong is infinitely preferable to trying to understand written instructions.
Have you checked out the City Guide and Teachers wanted forums?