You are the world's first Tinker 12. Each day you have five charges which can be spent to improve your tinker abilities within a specific area or theme. A single charge would make you a good tinker within an area, roughly Tinker 4-5. Each additional charge after this doubles your abilities (around a two point bump in rating), with no limits to how many times you can spend a charge on a certain area.
As a tinker you have superhuman scientific knowledge, understanding, and skill at applying it, able to make or do things that modern science would consider impossible within your theme. Spend a charge on Augmentation and start crafting cybernetics out of scrap. Spend some on medicine and cure cancer in an hour.
Should your different themes overlap then they stack, building off of each other and integrating perfectly. All fields of knowledge are viable for this. Spending charges on martial arts would let you design and teach unbelievable fighting styles, and a political science tinker could design forms of government that function better then anything we have today.
As long as you have time and resources, there isn't anything you can't do.
