There are many sports you can play in Bitlife, so here is how to play all of them and what they will require in order to play.
How to play all sports in Bitlife
In Bitlife, you can play a total of seven sports professionally, but in order to play them professionally, you must first work up to them starting from high school; along with this, you will also need a high athleticism stat. If you don't have a high athletic stat, you can raise this stat by going to the gym, taking walks, and doing martial arts.
That said, keeping raising your athletic stats up, and try to join one of the sports teams when you reach high school age. You should have no trouble joining a team if you have a high athletic stat; if not, keep going to the gym and trying to join a team after a while.
Sooner or later you should get accepted, and when it happens, you will need to keep practicing each year and go to the gym and other activities until you graduate. After you graduate from high school, you can move on to college where you will be able to apply for college teams.
However, you might also receive offers from professional teams after finishing high school, but you might want to stay clear until a few years of college as you might end up getting a poor contract.
But on the other hand, you might want to accept this offer as you may not get another one any time soon. If you accept the first offer you get, simply build your athletic skills up and search for a better team later.
If you want to wait for a better deal and finish college first, it's pretty much the same deal as high school; keep practicing every year, and after you graduate from college, you will be able to try out for professional teams.