Self-directed retirement

Will try to be succint. 67 y/o, retiring end of '24, plenty of money for retirement including SS, not extravagant but comfortable. Currently with financial adviser, fee-based, approx 1% annual charges. He has given good advice as I approach retirement re: shifting some assets around, tax management; very accessible. Question: would like to become self-directed to save his fees- is this feasible/advisable? If so, best way to educate myself? Securities are basically index funds and ETF, i.e. not actively managed, but there is periodic re-balancing, so his investment advice is not necessarily better than others. Some hurdles i see ahead-some possible Roth IRA conversions, RMD @ 70 1/2, which bucket of assets do I tap 1st, 2nd, etc, how to handle sizable life ins. cash value. I do have revocable Family Living Trusts for wife/myself. Any thoughts/questions?