When you have practiced enough deals to not get the math wrong. When your actually ready which is a long list of actual quantifiable criteria, not just a feeling
When you practice the numbers, know the buy box, know the rent box. Have done all the due diligence, checked the inspections, gotten bids on make ready. Have closing costs, down payment and reserves in place. Sooner or later it comes down to belief. There are 4 pillars 1. The strongest is having done it yourself- you know because you have already accomplished it 2. Somebody you know has done it- if they can do it I can do it 3. You get encouragement by people who have done what you want- these are people who have faith in you being able to accomplish it 4. Belief in yourself- this is the weakest form of belief but also critical because you will never start without it.
For the novice it can be as simple as the spreadsheet looking great but the facts of owning in a war zone will be constant turn overs, eviction, non payments and plenty of damage. All of which are not part of the analysis when you brand new. That bank account will show a huge difference between what was expected and reality
Stabilize, optimize, are you ready- no life events, high credit score, low DTI, reserves in place, down and closing in place. Do you have repair people in place, cleaners or management if you doing that. Now is it in the buy box and rent box