The only way you will get promoted to the division above the one you are currently playing in is to finish on top and there are several things that you can do to help your team achieve this. Failing to finish top of the division will means you will be playing the next season in the same division so make sure you do the following.
Choose a proper name for your team.
Design a kit
Create a captain for your team.
Recruit new Players
Upgrade your Stadium
Train your team.
Keep winning matches