Go ahead and build a vise ... heck, you can even use a vise grip pliers as a vise ... or, stick the end of the hook into a tree branch.
Then, when your curiosity has been satiated, go buy the best vise you can afford, one that you won't outgrow, and have fun!! Try out a bunch of them first, but get the best you can get. Tying is an insidious affliction. It's also a tremendous enjoyment!
<I won't say anything about rod building right now! I like to play fair!>
Trouts don't live in ugly places.
A friend is not who knows you the longest, but the one who came and never left your side.
Don't look back, we ain't goin' that way.