Hi,

Usually for class 12 or the entrance exam based on the 10 +2 level only the question based on ghe configuration of lanthanide are asked. For actinoid the electronic configuration is not asked usually. What is asked most probably is the special features.of actenoid like stable configuration, oxidation state etc.

So if you want you can skip the electronic configuration of all the actinoids and learn only the few asked actenoid elements configuration.

Hope it helps.