How should fast and what should I study to become a secondl class?

Hi and happy new year to everyone

I’m currently an ABFAN and about to become a third class automatically the upcoming September since they changed the rules an led we have to be an airman for 30 months .

I wanna prepare my self from now to get the right studies for the exam to become a second class because I know it’s hard to be a second class and the exam is not that easy .

I am trying to get any available pqs when I have duty in rate almost done and out of rate as well.

I utilize Usmap currently working my second one and soon I’ll get my bachelor degree and a certification in data analytics.

I’m printed the Abf manual and I don’t know where to start. My question is what should I study , how much and if I will be able to take the test as soon as I become a third class or I have to wait .

I work on a LHD type of ship Thank you