Ranking up to Level 25 takes time. I am currently Level 21 after having played 3 full seasons in Spanish Leagues.
I would expect to get close to getting to Level 25 in the coming season. All up, 140-160 games played.
The three key ways to rank up faster are:
1 - Win. You get bonuses to xp for winning.
2 - Score goals. Each goal provides a bonus to xp earned. More goals scored = more xp.
3 - Most importantly, keep a clean sheet. Stopping the opposition scoring provides a significant xp boost every game - from several hudred xp to thousands of xp. This is very significant in progressing towards Level 25.