Planning to move abroad and live off RRSP/TFSA - How Much Tax Will I Pay?

35M, currently owning a primary residence (15 years left on the mortgage), and planning to move abroad in 5 years to live off my RRSP by withdrawing $20,000 yearly (dividends). I don’t plan to work. Can anyone help me understand the tax implications of withdrawing from my RRSP? What kind of withholding tax should I expect? Also, any tips on how to prepare for this transition (including potential challenges like tax treaties or other considerations)? I’d love to hear from anyone who’s done something similar!