I always thought it would be the aplix on my BG 4.0 diapers that would give out, but it turns out that the elastic is the first thing to go for me. I don't sew AT ALL - not even buttons, really, though I guess I might be able to if I set my mind to it

So I have no sewing supplies, and could really use some advice.
Any suggestions for types of needles? Type of thread? Should I get a thimble? Will any 1/4" elastic do, or do I need to look for a specific kind?
If you know of any sites giving tips on how to sew this kind of thing by hand (basics like getting the seam started, finishing it off, etc.), I would love to see them! (I have looked through some tutorials on how to replace the elastic on BG, but they tend to say something like "sew both ends of elastic to the seam allowance," assuming you know how to do that... and I don't!)
TIA! This is all very new for me.
Re: Non-sewer replacing BG elastic