Hey Tav welcome to the forum.
Here's a link for some knots you should know. For joining tippet to the end of your leader, use a Blood Knot as Ard suggested or a Double (or Triple) Surgeons (much easier but a bit less reliable than the blood knot):
Grog's Fishing Knots Index
As others have suggested, a 3x leader would be a good place to start and add a spool or two/three of tippet to cover the size of flies you fish. (Hook size divided by 3).
For throwing wind resistant stuff like poppers or heavily weighted flies like clousers for bass. I like a short, heavy 8' leader tapered to 0X or 1X (around 10-8lbs). For tippet, I'd add 2' or so of 6-8lb test (regular mono fishing line or tippet)
There was a recent thread about making bass leaders here:
"Furled leaders" are also a great solution, basically they are made with many strands of filament ending in a small tippet ring, and you just tie a few feet of tippet to the ring.
Keep asking questions as you get them, and take a browse through some of old threads and the FAQ section. There's lots of info here already as well as a bunch of helpful folks here that can help get you started.