403b contribution

Hi,
I am trying to plan next year contribution by front loading max allowance. I plan to work only half year (Jan - June 2025), then travel the world a bit

Some relevant information below:
- 50 years
- Residing in Calif
-Single filing taking standard deduction
-Salary 130-135K

So lets say with the Gross of $130K year/12 months is about $10833 a month. If I want to max out my 403b (23500 plus 7500 catch), I would just have something like this below. I want to pay the least tax first 6 months. Does this look right?

Monthly Gross 10833 (130000/12)
Pre-tax deduction -5166 (31000/6months)
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Taxable $5667
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Also if I decided to work beyond June, then the subsequent checks will have a larger taxable amount since I already used all the pre-tax deduction? Anything else here I should consider?

I also plan to contribute $8K to the Roth IRA (using money from other account).

Thanks for reading.
TT