Here is what I recommend for the first time
1) I 100% recommend doing small batches, like 1 gal. You are on the right track by wanting to start there. That way you can experiment without blowing a pile of money for something that is just 'ok'.
2) Juice: A cider can be as simple as apple juice and yeast. Most juice in a bottle has an SG of 1.045-ish. If fermented to 1.010, which is a sweet cider, you would have 4.5% ABV. Use juice that does not have any sorbate in it. Ascorbic acid is ok.
3) A good yeast is actually Safale S04. It ferments clean and settles out very nicely. I ferment using S04 at 50deg. I also add 1/2lb DME per gallon to give it some more body. With that level of DME, you get an OG of 1.060. I like mine sweeter than most, so I cold crash at 1.020.
4) Carbonating is much trickier than with beer. It can be done, but is risky (from a bottle bomb perspective). There are other threads on here that talk about this.