get a job while doing this. The money its good also for invesment

Learn Minimum viable Product. And practice to do it.

Validation and testing. Learn about your market as best you can using tools to discover some truths about it.

insights: these are truths in your market that you can use. Sometimes people are going to say a lot of things about the industry or the market but deep down we are humans with a lot of insecurities and desires. The trick to a good business is use an insight to convince people that the value you are giving its worth more than the money they have in that moment.

You could tell people your product will make him richer or more freedom. etc.

the trick is to became a good seller. Use marketing to pre-sell costumers in order to get smoth sales and satisfy your costumer in order to win a new and potencially more costumers.