I would like to submit an application for Irish naturalisation but I have few questions for which I am unclear and seek guidance.

I received a Critical skills work permit valid from 25/05/2020 but I have received the following IRP's dated:
- Stamp 1 - 02/11/2020 --> 02/11/2021
- Stamp 1 - 05/12/2021 --> 05/12/2022
- Stamp 4 - 10/07/2022 --> 31/07/2024
- (future renewal of stamp 4)
1) As reckonable residence can I count from 25/05/2020 (date of work permit) or does it starts only from date of issue of my first Stamp 1 (02/11/2020) ?
I started working from the work permit date and I would lose a significant amounts of months if the application is based on date of issue of stamp 1.
2) During those years I have travelled abroad but always under 6 weeks, still will those days of travel need to be added onto the reckonable residency period like 5 years + 10 days, etc ?
I am asking the above as I am trying to figure out the date of which I can send my application and I am confused as whether it will be 25/05/2025 or 02/11/2025 or more depending on holidays taken over the last years.
Thank you very much for your help!