Generally, the level of business degree you choose will depend on what qualifications you already hold. If you already hold an undergraduate degree (in any subject), you can consider enrolling on a masters degree in business or postgraduate short course across a range of specialisms.
If you have existing work commitments and/or time limitations, a distance learning business degree – such as the online, part-time Business in Tech MSc programme from Ulster University – may provide the flexibility you need.