Thanks very much guys. Thanks very much for supplying me with links Scooter! That bundle looks ideal! I just want to confirm that the bundle will definitely work with my d5300?? Thanks again!
Yes, that will all work with your D5300. The camera itself is fully TTL capable, it's just that the pop-up is not enabled as a master/commander unit on entry-level Nikons for controlling remote flash units. But you don't want that anyway as it uses an optical system that's less reliable than radio such as the Godox X1-T.
While everyone needs a decent speedlite flashgun (they're just so useful) they're not the best choice for studio work. Lots of threads on this if you have a search down this forum, but a mains powered studio head will give you a) a bright modelling lamp so you can see what the light is doing, b) they recycle much faster which is important even for basic portraits, c) they have more power when you need it, and d) they work better with studio light modifiers (softboxes etc) that fit straight on with no adapter necessary. Not expensive either, starting a bit over £100 for a Lencarta Smartflash-III - it's a rebranded Godox so works with the same trigger, using a little plug-in receiver (£15). As Phil says, you don't need or want TTL for studio work. You can use speedlites with studio heads, and they work well as a background light, or a hair or accent light, once you've found your feet.
Then you need a modifier, such as a white umbrella or softbox. I'm a fan of umbrellas as they're so cheap and easy, take up less floor space, and give great light that's basically the same as a softbox. The cheaper softboxes that you have to assemble each time are a right PITA - go for a push-up umbrella type (eg Lencarta Profold) that are well worth a little extra cost. Then you need a reflector, eg white/silver, and a stand, then you're good to go.
One light (plus reflector) is all you need to get started with portraits. Very often, less is more. It's also a good starting point for product photography, though that varies greatly from basic white background stuff for ebay etc (light tents are cheap and easy for this) to complex sets for high-end work. Whatever you do though, learning and knowledge is key, understanding how light works - much more important than kit
