Investment account and IRA withdrawal tax impacts in year turn 59 1/2

We are retired and had no income in 2023 and 2024 (we lived off savings and filed married jointly return). Since I will turn 59 1/2 in 2025, and we plan to withdraw money from a taxable investment account and potentially my IRA to live on, does the withdrawal qualify as regular income (same as if I had a paycheck) in terms of tax return? We are trying to determine how much reported income we’ll have in 2025 to see what kind of health insurance for 2025 we can get from ACA or private insurance.