Next step is to scout out potential properties and get comps for what the property would be worth once completely renovated. Then the step after that is to find a lender who is proficient in BRRRR and have a real conversation with someone who can guide you on the proper next steps and costs/risk should you decide to make an offer on the property. Most lenders have two loan products which will be needed to accomplish the BRRRR method. The first loan is the "Purchase and Rehab" loan, and the second is the refinance loan which is called a "Long Term Rental" loan. Once you establish your lender and get terms in writing for the initial purchase and rehab loan, (most Hard Money lenders only require a few bits of information such as property address, purchase price, Rehab amount, ARV, FICO, cash on hand and experience level), request a pre-approval letter and make your offer! Also, a great next step if/when your offer gets accepted is to open an LLC if you have not done so already. Most Hard Money Lenders won't allow title to be vested in someone's personal name. If your offer gets accepted, a good lender will work with you daily to make sure all of the needed items for your loan are in before the appraisal comes back. If you've done your homework, then the appraisal should also reflect the initial "ARV" you provided, or somewhere along that line. Then you're ready to close and get to work!!!!
I am always happy to connect and help answer any other questions you have. This can be intimidating at first, but also extremely rewarding. It's so important to establish a good "tribe" of professionals (cooperative components) that you will use for each transaction. Once you get good, it really is rinse and repeat! Hope this helped :)