Welcome to the forum Mekks! Your English is perfectly fine too!
Both Faberdashery and Colorfabb are an excellent choice of filament. I use both and the results are great, choice just comes down to a matter of colours and price. The price is not too different unless you start using colorfabb bronze and copperfill ( two other great filaments ).
XT is a copolyester which is more like a PLA, but acts more like ABS when printing, i.e should be printed at higher temps like 220-240 ( newer stuff even higher upto 260 ). Whereas I print most PLA`s around 200.
The smell of all of them is about the same. Sometimes my house smells like weed, marijuana lol.
Storage depends on how long you intend to leave them un-used, probably not very long I have just bought some standard plastic storage containers ( with lids ) from stationary stores, the ones that stack on top of each other. There are a couple of those silica bags of gel inside each box, but to be honest I dont think you need these unless you are going to leave the filament for months n months without use.
Some filament comes supplied within a zip-bag and I store filament in these too.
Printer can just be left as it is, unless in a very dusty environment. Mine gets the occasional wipe down from dust and cat hairs ( grrrrr cat hairs ) but typically I just leave it alone most of the time and its still printing perfectly
Good luck with your purchase, you will have great fun with the UMO!