Sure, I just used a random gender generator to pick the genders, so let's go with instead.
- Infanta Juana (1479)
- Infanta Maria (1482)
- Infante Enrique (1484)
- Infanta Leonor (1490)
- Infante Juan (1493)
- Infanta Catalina (1495)
- Infante Fernando (1500)
Here Ferdinand and Juana have 3 surviving sons to secure the succession and 2 daughters to marry off. With regards to their upbringing, it depends on how Juana reacts to her victory. On one hand, she wants to prove she is her father's daughter by reigning in a similar manner; on the other, she might see it as God's grace for her keeping her throne and go hard on the Catholicism bandwagon in response.
Who knows, she might get a personality similar to a certain OTL female monarch with a disliked mother and (probably false) rumors about the paternity. Long live Gloriana!
Some wedding suggestions for them:
For Maria either Portugal as bride of Alfonso of Portugal (b 1475) or Austria-Burgundy as bride of Philip (b. 1478) (maybe Mary of Burgundy can live longer and Anne of Brittany being luckier than OTL so Anne can escape the French and be married to Philip who is only a year younger than her)
Leonor looks too young for either but of the perfect age for being engaged to Arthur Tudor (b 1486) then married to Henry Tudor (b 1491) or can be married to Ferdinand, Duke of Calabria (b 1488)...
Some brides for the boys:
Magaret of Austria-Burgundy is born in 1480 so is a little too old here (but if her mother survive until 1490-1492, Margaret will be married in France but can have an ATL younger sister Mary/Isabelle/Eleanor born in the years between 1483-1492 available for Enrique)
Navarre can offer Anne of Foix-Candale (b 1484) or Germaine of Foix (b 1488) or one of the many daughters of Queen Catherine Anne (b 1492), Magdalena (b 1494), Catherine (b 1495), Joan (b 1496), Quiteria (b 1499) or Isabella (b 1513/1514)
Naples can offer the two daughters of their OTL last king from his second wife: Julia (b 1492) and Isabella (b 1500) as their half sister Charlotte is born in 1480
England: all the York girls here are too old but the daughters of Henry VII and Elizabeth of York are of the right age: Margaret (b 1489), Elizabeth Tudor (b 1492) and Mary (b 1496)