You have to realise first why you want to become a youtuber
If it's just a hobby you can just relax and do everything you want (until YT blocks your channel

)
But if your aim is to earn with youtube you should prepare a really good content plan and pay a lot of attention to details and your audience
If you don't violate any terms of youtube then our channel will never get blocked and also we can have many channel as much as we want there is no restrictions on it but one who want to make money need to stay focused on the particular subject.