@ryan The ETA 6497, ETA 6498, Seagull ST3620, Tianjin 6498, and similar clones are good-sized movements to start with. You can then work your way down from there as you get more comfortable.
Investing in a good set of screwdrivers (VOH, Bergeon, Petit Pierre), brass tweezers, a movement holder (Bergeon 4040 or 4040-P is a good starter), and a loupe anywhere in the 2.5x to 5x range is all you need to get started with these movements and is a better investment than a kit.
When you find you’re comfortable enough to take apart the anti-shock system, a quality pair of #5 anti-magnetic tweezers and, optionally, purpose-made tools for the specific anti-shock system you are working with would be a good next step.
Disassemble and reassemble until you can easily do it without consulting a guide, and only then start to consider pricier investments like lubricants, oilers, cleaning solutions, cleaning machines, and timing equipment.