Working outside IR35 for the first time

Hello.

I have been given the opportunity to take up a 6 month contract job which pays outside the IR35. I have never worked outside IR35 before. I have always been employed by usual employment so I didn't do my taxes or pension but they were automatically deducted from my gross pay.

If I take up this role, how do I make sure I am not going to be worse off or how much hourly rate I need to earn to make the same or more money than the usual employment.

Would I need to hire an accountant to do my taxes or can I do it myself?

Would I need to register a company representing me to work on this contract?

Any other pitfalls of working outside IR35 that I need to be aware of?

Thanks.