Value, not priceAt the start, try to choose everyday goods, of average value and with a mark-up of 100 per cent or more, without paying attention to high competition. This way there is less chance of going under. Especially for a newcomer. And do not dumping: compete not by price, but by value.
Remember: the customer exchanges his money for some benefit. A deal is favourable to the customer when he gets more than he gives away (or at least he thinks so). This can be achieved by either reducing the cost or increasing the value in the eyes of the customer. And almost always the right decision: increasing value.
Don't forget that it is your customers who pay all your expenses with their money: advertising, logistics, employee salaries, and so on. Which means your markup should include every item of these expenses. That's how the profitability of your dropshipping business will be sustainable and the risk of going bust will be less.
You can learn more useful dropshipping tips from other articles published on the Selpway blog
https://selpway.com/en/blog.