The single most important question to be able to answer is "why does your project need to use a blockchain", followed by "which part of your project needs to use a blockchain".
This article on Avoiding the pointless blockchain project from 2015 has some areas to consider.
This research paper on Do you need a Blockchain is another good reference to familiarse yourself with.
What questions do you think need to be considered when deciding when and how to use blockchain technology? Go through those questions for a project you are planning.