It is important to determine where you will apply to get an endorsement.
The key question for tier 4 visa holders to consider is whether you should get an endorsement from a university or an incubator?
Endorsement from a University
An endorsement from a university will only last for two years, resulting in you having to apply for another endorsement from an incubator should you wish to stay in the UK permanently. In other words, whilst it is easier to get an endorsement from a university in the short term.
Endorsement by an Incubator
It is wiser to get endorsed by an incubator, especially if you are considering applying for settlement as you will need to apply for an endorsement again. By having an endorsement from an incubator previously, it will be much easier to gain their endorsement again since they are already familiar with your business.
You might be asking, why not just apply straight away for the Innovator visa? As a graduate, you are most likely to not fulfil the criteria of being a business person with experience and expertise. However, it is possible for there to be exceptions such as mature students or PhD, who may be able to fulfil this criterion. Whilst for younger students and graduates, pursuing a Start-up visa is the best option.
Once you have decided which visa to apply for and received an endorsement, you can apply for the start-up visa online.