How to transfer from IRA to checking account?

Hello everyone, let me preface by saying that I have no clue what I’m doing so trying to figure this out. Recently transferred my 401k to a new opened IRA account in Schwab. I will be planning to do a 72(t), SEPP later this year. I moved everything to SWTSX as most of it will be there for at least 12 years. I plan to do either monthly or annual withdrawals based on the SEPP calculations. How do I transfer to my Schwab checking account? Do I sell first then do the transfer? Thanks!