If you’re living in the UK via a Skilled Worker visa, you will have to earn £25,600 per year (at least) unless the market rate for your job is higher than this. If the market value is 30,000 and you make 25,600 – you would be considered not eligible.
You are not permitted to combine your income with your spouse’s to meet the salary requirement. The requirements must be met by the applicant on their own.