@shemii
The answer is: "hard work".
You need first to clearly formulate the business problem you want to solve and create a business case. Then you need to find a sponsor within your organization (=someone willing to fund your idea).
Once you're there you need to further specify your business requirements and ideally get your enterprise architecture involved. After some additional Internet research you might then be in a position to contact vendors first with a request for information and the shortlisted ones with a request for a proposal. ...and so on.
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