Find a product that sells well, order one test unit and sell it locally at a margin you have worked out.
Reselling works when you buy at the supplier's price and your customer pays more for the convenience: fast local delivery, someone who answers questions and a product you have checked yourself. Marketplaces like AliExpress list the same product at very different prices, and their bestseller lists show what buyers already choose.
Start with one type of product you understand and order a single test unit. Check the quality, size and packaging yourself, and photograph it in a real setting. Then work out your real margin: purchase price, shipping, fees on the platform where you sell, returns and your time.
Read the reviews for complaints about size, materials and delivery time, and plan for two to four weeks of shipping. Find out which rules apply where you sell: consumer law, safety requirements such as the CE mark on many products, and any import duties or VAT on your parcels.
List it locally with your own photos and a clear description, give a delivery date you can meet and answer messages the same day. Put the first profit into a slightly larger order, and drop products that keep being returned.
