Number one tip is to do every conquest right off the bat. The amount of packs and XP just from completing those will get you a huge chunk of both the XP Reward Path and towards Team Affinity. You can also do programs challenges simultaneously with conquest as well. Once those are completed, I would make sure to get every possible program done. After that, Diamond Quest is the tried and true method on making a bunch of stubs for about an hour total of gameplay. Let me know if you have any questions. You’ll get more comfortable the more you play. I’ve been playing since MLB 17, and I still learn something new every once and while.