Welcome to the obsession. And welcome to the site. First of all, you've learned one of the most important things. Stay away from galvanized or plated metals if at all possible. Other than that, don't confine yourself to just making one thing. Yes, knives are cool. But there are so many other things to make it will make your head spin. Start with smaller, easier things to gain hammer and heat control. Start with the basics. There is a wealth of information on this site to learn from and many experienced and helpful people.
Start with going through the forums and reading the different topics. Go through the gallery and look at the vast array of items that have been posted here. From the basic to the very detailed. Lastly, feel free to ask more questions. And post pictures of what you have created. Pictures help us see exactly how you are doing.
Good luck and have fun!
Mitch