You own your page, its up to you how you represent your page. Having a good structure is not only google robot friendly but also reader loves to read content.
H1 tag is header tag so it advised to use it once in a webpage and if your desire of using subheading then use H2,H3,H3, H4 tags .
H1 plays the most important role on a page. With 2 years experience doing SEO yourself to recommend only one H1 tag that onpage prepare for your process
Actually it should be in proper heading structure just like we have ib our text book. Google algo is a bot so we should design pages as per algorithm and to provide highest user experience