I have a question regarding how one should set up various Nostr feeds. (What should I call them?)

If I want to have a personal broadcasting feed on a specific topic, say a political topic, and a personal Nostr account, is the best move to post only political related information on Nostr key #2 and repost it with my person Nostr key #1?

In order to keep the 2nd feed more on-topic for a broader audience?

Do we have channels that are emerging as rebroadcasters of interesting information someone can direct me to?