No matter how brilliant you are at what you do, if you don't manage to convince potential customers that your business idea, your offer, is, if not unique, then at least something special (through your personality, your mix of methods, through your special way of conveying content), you will not succeed in building a successful online business.
Your viable business idea also includes an idea of how you want to build your product ladder. If you are purely an advisor and only indiatelegram screening sell your time online, then you cannot really scale your online business. In this case, scaling means that you also make offers that generate sales, or better yet, profit, when you are not working.
At night, on weekends, on vacation or when you get sick.
In my opinion, this includes a healthy mix of 1:1 offers (because they are quick and easy to implement, especially at the start), perhaps a members' area (if that fits your topic - but be careful: a membership is more work than just giving a few seminars and answering a few questions), online courses (if they are purely self-study courses, they are wonderfully scalable, but of course only to a limited extent with supervised self-study courses, which have their advantages).
You can also think about an online shop with "digital products" of various kinds or even affiliate marketing, which can be an additional source of income for you.
Some people also talk about building up a passive income. It's not passive in the slightest, but it works very well if you spend time on it.