It's super easy to start using Stripe so that you can accept payments through your company instance. Go to Settings --> Financial. On the top of this page you'll see a section called Receiving Payments. Next to the title 'Merchant Gateway' there is a drop down option (yours probably says Authorize.net). Click on this drop down option and choose 'Stripe Connect'. There will then be a blue box that says 'Connect with Stripe'. Click on that blue box, which will help you finish getting set up.