The mistake people often make when they try to make money online is, juggling too many projects or attempting to manifest too many ideas or schemes. One ought to focus on a single idea and make it profitable, only then one came explore other ventures to increase their sources of income.
This book has helped me identify and focus on a single venture and to make it profitable
https://sites.google.com/view/profitstreams/home
Creating an online business has a steep learning curve for beginners, hopefully this can reduce it by a bit.