>>4403243Go about it methodically and you'll fuck up less than the average 4chinner, as
>>4403260 said.
Buy a godox speedlite like anon suggested. You won't really need a softbox, as it will come with a basic diffuser that'll be sufficient. Make sure it has TTL as it will reduce the amount of shit you need to fuck around with on the day. These are like $80-120 AUD.
Adapted microSD vs full SD card is not a major point, but adapters are just another point of failure. The real issue is only having one SD card slot / one body. If something konks out, you're going to have to tell a bride and groom they have no photos for their once-in-a-lifetime event. Having a spare body is a very good idea if you can front the extra $100 for the next cheapest crop canon DSLR you can find. It's basically insurance. But yes, buy a fresh, quality SD card; they're $20.
Spare batteries are a good idea. At least one, but you can get some cheap 3rd party ones off amazon for not much. Yes they're not ideal, but they're good enough. A grip is unncessary unless you're a griplet and for some reason wielding a 100-500mm f/5.6 for a wedding (you're not).
Reflectors are good if you have a poor mupp... er, associate to hold everything and help set up quick shots. But even then it's a bit overkill. Wouldn't bother.
Filters? Not really, but depends. If you're taking sunset photos or bright midday outdoors photos, a GND and a VND would help respectively. If you're going to be shooting near water, or other highly reflective surfaces, a polariser has merits but is not completely necessary.
The kit lens you have is fine for outdoors, good to slightly shit lighting. You WILL want the 50mm f/1.8 as it's completely ideal as a solo/duo person portrait lens for a crop sensor and it's cheap as fuck. You will end up using the kit lens for group shots or for environmental inclusion in all likelyhood.
