Study gap before applying for Canadian study Visa

I passed out in August of 2021 with a bachelor's degree (B.TECH) in Computer Science and I'm currently applying for a master's in Computer Science for the Summer 2023 intake. After passing out I worked on my own online startup and did not go for a full-time job. Is this a problem when I apply for admission or a study visa in Canada since I do not have a work experience certificate showing what I did during my study gap? How do I justify my study gap adequately before applying for a visa? I'm also planning to take a 7-month certification course.

Thanks