What happens after the 8 weeks of lente-membership?
This is up to you. If you have enjoyed the lente intro, you can sign up and become a member and stay for free until the Tu/e intro. During the summer rowing is a little bit less structured and you should be proactive and ask people to train together or chill at the association in the sun with a drink and snack. Everyday there is someone at the association and new friends are easily made. Depending on you, you can start race rowing or competition rowing at the end of August.
The lente intro period is completely without obligation, so if you do not like rowing or the association, you can just stop after the lente intro.