So I came back after a year of not playing a game and was overwhelmed by the new content and a lot of.. unknown things.
Back a year ago, we had Syrcus Tower raid and were trying to collect alagan tomestones for level 100 weapon, as well as collecting tomestones for equipment. All has changed now a bit, and now that i came back i have no freaking idea where to find everything and how am i supposed to know everything ?

I saw in Ishgard some shop where you can buy some green items level 145~ items where you can put materia in. you can buy them for some 5 yellow things. Now where do i get those things from ?.. Are those green items now all there is, or are there blue items somewhere to be found ?

Basically where am i supposed to find equipment lately ? because mor dhona has everything up to ilvl 120. but where after that ? lvl 120 weapon requires some different sort of allagan tomestone, where to get that from.. ?
i just have no idea where to find everything..