can someone give me some tips on how to train my team and overall get better.
You are in d4....just perfect! This is where you want to build your arena not in d3.
May I suggest an ambitious plan, you will steadily see the benefits of this plan and allow you to spend with muscle down the road..on trainers, players you do your thing.
May I suggest a 5 season plan of dropping at least 2000 seats every season. The bleachers, that is 700k, after the seats are built provided you have a continuing competative team. You will see the revenue rise...resist the urge to spend the new funds you will get...continue to train, but the focus is building your arena. The next season...drop in 2000 more. After the second season, focus on the higher price seats, 1000 lower lvl seats will be within your spending range, keep putting the money back into your arena. Remember you are a GM, not a coach your primary focus is to help the team win while making a profit......focus on your infrastructure (arena), train a franchise player, a solid not an elite staff, and good supporting players, and you will win a great deal.
Salute!