I'm playing TE for some weeks now, i'm not a pro but all i can say to improve your character stats :
- Play doubles, i read that it can give you 50% more XP
- Lower your difficulties if you think it too hard. I play junior 8-9 on my side and increase difficulty bit per bit. the main thing is enjoy, not always lose 0/6.
- When i began, i did play singles + doubles one week, but didn't play the week after. That let you have some XP the first week, and the second to build up your stats.
Hope it helps