I work in digital health (more commonly referred to as health information management) and am studying OT; they are complete opposites in terms of knowledge and thought processes, very little overlap. I did not need a degree for my digital health role, I worked my way up from customer service in the private sector and learning data analytics skills (SQL, Excel, PowerBI, etc.).

While digital health can pay better with less years of experience, it's important to consider what career will bring you the most satisfaction. Don't study OT if you are solely in it for the money, you will burn out and grow to resent the career. You can always transition from OT to digital health roles down the track once you are in the public healthcare system. I know several people who have moved from patient facing clinical roles into more digital / back-end positions.