Resale HDB: Anybody has a housing loan and partial capital repayments spreadsheet? Intending to finish off paying my house by mid 30s. Anyone keen to share their excel sheet?

Saw news that a couple paid off their house by mid 30s! By repaying early, I understand that there will be accrued interest. However I have no intentions to move out or sell the house. Want to have early home settlement so that I do not have any housing liabilities by my thirties. Anyone can share their calculated spreadsheet if I were to do partial repayments yearly let's say 10k/yr?
Currently 25. Buying HDB Resale of $420k. Housing loan serviced using both me and partner's OA at 1.2k/month.