Advice for a beginner:
1. Always do research before you buy.
2. Context! Context! Context!- Time, place, unit, and other factors determine what is correct uniform, equipment, etc.
3. Develop a persona. The personal items you carry/wear will be determined by WHO you are. A confederate soldier in western Virginia was captured trying to pass through US lines as a "poor farmer" because his expensive boots gave him away!
4. Practice the drill, not just at events, but between. Many reenactors are poor at drill on account of they don't read the manual themselves or practice on their own, just when the sarge makes them.
5. Go for an average, plain look. Avoid one-of-a-kind items. If you have to look hard for evidence that something was used, you probably shouldn't get one. Some things look really flashy and cool but are only correct for a specific unit at a specific time (or not at all).
6. Less is more. This is kind of a repeat of No. 5, but it's very important.
7. Save your money, learn what is accurate, and buy high quality gear. One often quickly purchases cheap stuff to get into the ranks as soon as possible, only to do more research later and find out it's all historically incorrect.
8. Do your own research. Don't take someone else's word for it. Question everything. It's more important to know WHY something is correct, than just knowing "so-and-so sells authentic things"
9. Do drill by the book. Avoid shortcuts.
10. Keep those tins in the cartridge box!
11. Shoes are the last things you want to cut corners on. Many these days are very poorly made- the pegs are widely spaced and so shallow they're just for show, with only glue holding the sole on.
12. If you have any sewing talent, making it yourself is often cheaper.
13. Confederate uniforms/ equipment became more standardized and higher quality as the war progressed, not vice versa.
14. Be wounded or captured; too many people are "killed" outright.
15. Have fun.