With respect, the problem people have with any sort of neddle work is, they try to run before they can walk.
The basic principals must be stuck to. Once you've got the hang of those, the rest just comes. But few people can produce the sort of things that professional taylors do. Stick to what you can resonably manage. Disappointment is a killer.
A set of sharp needles. Needles must be sharp. You need a number of different sizes. Keep them in a small pin cushion. Tacking pins are generally sold in huge packs. You won't need more than about 20.
A selection of good quality thread. Cheap thread, such as is sold in variety packs just breaks. Thread needs to be stored correctly. It shouldn't be damp or too warm. Cotton is best, but cotton is organic and like all organic things, need to be treated carefully.
Several pairs of very sharp sissors. I suggest 3 pairs. A long pair, a medium and a small pair. They must be replaced when they get blunt.
Several good thimbles.
A good light.
Make stiches small. If you're in a rush, find something else to do.