Don't rush out and spend your money on shiny bits just yet. Few things to think about for you.
Hardly anyone bothers with full head coverage masks, they're not that comfortable and tend to get quite hot and sweaty. I understand you took a bad one to the head, probably with site quality paint which is renowned for not breaking easily, it's never top grade stuff.
Consider a standard mask and a decent beanie hat or headband which will take the sting out and be a lot more comfortable for you.
Buy that first.
Next, scour the classifieds here once you get up to 20 posts and keep an eye out for a cheapish loader. Look for a Halo or prophecy for less than 40 or 50 quid, both fairly bulletproof and will capably feed whatever marker you decide on.
Air tank should be the last thing you buy, most sites will have a spare they'll be happy to loan you and it'll save you money which you can in turn spend buying a decent marker. that JT thing is a marker shaped object, good for feck all really and when you decide you want to upgrade you won't get a dog to bark at it, never mind someone pay money to take it from you.
Again scour the classifieds, look out for an Empire/Invert mini, Eclipse etha, etek, Proto PMR or rail and you'll find they outperform all your basic "package" guns by a country mile. You might need to up your budget slightly however a small increase initially will pay dividends in the long run and you'll come back to thank me. The above markers are basically junior versions of their performance big brothers and will in most cases feature more than you'll ever need. More importantly parts and suchlike are freely and easily available, as is tech support.
If you can get to a walk on, tournament or big game you'll be surrounded by stuff to look at and see and more importantly try on for size. Guns will be on display and people will be walking around with their kit and trust me, paintballers love to talk about their stuff. Feel free to ask questions and make enquiries, tell them Dusty sent ya