I think that by the end of the month, we'll have at least a basic CFW. Technically we already have a CFW but it doesn't have sig patches. https://gbatemp.net/threads/how-to-load-a-fw-img-for-any-file-dumping-wiiubru-status-update.445840/
No, the WUP installer can only install titles with valid tickets and since a homebrew launcher WUP wouldn't be from Nintendo, it wouldn't have a valid ticket.