What to buy as new player first?

https://preview.redd.it/ko1xk5v6i6be1.png?width=1898&format=png&auto=webp&s=c744fe3de7b922735d2a2aa8f77b27f0515a4762

I don't think I'll have enough level to farm it further by the time event ends (I'm level 23 currently) so I'm kinda limited and not sure which material to buy first. Thanks in advance!