Good choice, it's an excellent rifle within its niche. They are not known to be particularly picky about ammo, but stick with typical 55gr if you want to be on the safe side (steel case is another matter).
Currently, many of them are sold without a magazine, but aside from that it shouldn't need anything out of the box. I think they generally have a reputation for running well with a variety of mags.
If you're mounting an optic, there's not much rail space to work with. Depending on what you're trying to do, you may need a cantilever mount. Optic height can throw you off because the stock tube is lower than a typical AR.
If you want to put a sling on it, it will need some kind of forward attachment point.
The buttstock is easy to swap if you want something that looks or feels different (should be a commercial spec tube).
If you plan to use the folding feature a lot, some people replace the stock takedown pin with a wire lock pin of the correct length and diameter.