3on3 FreeStyle

I'll preface by saying that in this game, User Level 20 is super high; expect this to take about 3-4 weeks of playing every single day more or less and plenty of hours per day with not too many losses. As for Level 30, which is ungodly high, the current max level (no longer; current max is 40, which I won't even talk about), you can expect that to take about two months (or one additional month past level 20).

You start at Level 1 and level up by accumulating EXP, which you can only gain from playing matches in fixed increments as follows. In 1vs1 a win will give you 160 EXP and a loss 120 EXP, whereas in 3vs3 a win gives you 220 EXP and a loss 180 EXP. Obviously, to level up the quickest, you want to play only 3vs3 and win every match you can. Losing often will increase the time this takes drastically in the long run, so try playing with friends or make friends with good randoms you encounter. Opt to group up after matches if your teammates were good and roll with them a while, maybe add them as friends to play again another time. I emphasize this because a lot of players are completely clueless and there are several groups of people who play competitively, who have purchased microtransactions, have really good characters and communicate tactics effectively, so expect some very unfair, one-sided matches if you don't team up with good players and have senseless Joeys on your team. If you come across such a group, wait a minute before searching for a match again, because there is a high chance to be matchmade with the same group and get wrecked another time...

With that said, I'm going to mention that this solution is not here to teach you how to play well, or we'd be here all day. You can use common sense, read the basketball position responsibilities on Wikipedia, study every character's attribute numbers in-game to learn their strengths and weaknesses, use your character's skills effectively, check out every other character's skills to learn what they are capable of, fake pump when necessary, learn from experience, have a balanced team composition, Youtube videos, Google searches, the 3on3 subreddit, etc. There are plenty of resources and strategies you can find if you search for knowledge.

Instead, this solution is here in order to put the grind of leveling up into perspective. Therefore, I kept track of the EXP required to advance from level to level and the number of full 220 EXP wins in 3vs3 required to reach the next level, written between brackets. The purpose of that is to underline the almost absolute minimum number of matches you have to play between levels and also overall, if you add them up. My list is below:

Level 1→2 — ??? EXP (2 W in 1vs1; cannot access 3vs3 yet)
Level 2→3 — ??? EXP (3 W)
Level 3→4 — ???? EXP (6 W)
Level 4→5 — ???? EXP (9 W)
Level 5→6 — ???? EXP (13 W)
Level 6→7 — 4122 EXP (19 W)
Level 7→8 — 5496 EXP (25 W)
Level 8→9 — 7068 EXP (33 W)
Level 9→10 — 8835 EXP (41 W)
Level 10→11 — 10800 EXP (50 W)
Level 11→12 — 6480 EXP (30 W)
Level 12→13 — 7647 EXP (35 W)
Level 13→14 — 8930 EXP (41 W)
Level 14→15 — 10304 EXP (47 W)
Level 15→16 — 11781 EXP (54 W)
Level 16→17 — 13349 EXP (61 W)
Level 17→18 — 15021 EXP (69 W)
Level 18→19 — 16784 EXP (77 W)
Level 19→20 — 18650 EXP (85 W)

Level 1→20 — 700 W (approximate)
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EXTRA

Level 20→21 — 20607 EXP (94 W)
Level 21→22 — 20244 EXP (93 W)
Level 22→23 — 22188 EXP (101 W)
Level 23→24 — 24210 EXP (111 W)
Level 24→25 — 26309 EXP (120 W)
Level 25→26 — 28487 EXP (130 W)
Level 26→27 — 30768 EXP (140 W)
Level 27→28 — 40352 EXP (184 W)
Level 28→29 — 47589 EXP (217 W)
Level 29→30 — 54955 EXP (250 W)

Level 1→30 — 2140 W (approximate)
Level 20→30 — 1436 W (rounded up)
Halfway Point between Level 1 and 30: At Level 23 and 3/4 to Level 24
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Note: The first 5 levels' EXP requirements are missing because I wasn't keeping track in the beginning (but the wins required should be accurate), so if anyone can help me complete the numbers, please comment below (you can find how much EXP is required to level up by going to Management -> Stats -> User Stats).