There is less sense in buying and training FTs at level 2 as your training level is still low.

For the next couple of seasons I would recommend you to:
- reach training level 91 or be very close to it;
- develop your ground as much as you can (with a focus on training fields to have more green packs);
- save up green packs from daily videos

Think of a strategy on how you will spend your greens (because it is hard to make mistakes and spend (waste?) tons of greens if you don't have a plan)

Good luck!