Finding a business idea can be super difficult and time-consuming. But it is important that you spend time choosing something you are interested in so that your idea can become a reality and last in the long run. Because you will encounter many problems along the way and for you to have energy for them, they require a great deal of will.
Do something you are interested in for example if you are interested in strength training do something within them or do you see a problem that you see a good solution to that you want to change. Or is there something in the world that you are extra passionate about that you want to change.
In order for it to last in the long run and for you to be able to invest time and energy, you need to have a good business idea that you have a great genuine interest in. If you can do them without being paid in your spare time, for example, you can go a long way. If you do not know them, you should review the business concept. This does not mean that you should not get paid or charge the customer because of course you should have paid and you also need payments in the end if you want to do it full time but sometimes it can be good to think in those paths.
Starting your own business is difficult and it comes with many challenges, but if you have a genuine interest, you also have a will that allows you to overcome these challenges without problems in my opinion. Choose something you are interested in, something you want to change, or are very passionate about!