Individuals or startups often look for people to review their products to encourage others to buy them. You can either get started with a profile on freelancing websites or approach companies directly, offering them a review in exchange for a monetary reward by becoming an influencer. Even better, if you have your own website or blog, you could write entire posts about their products, thus allowing you to charge more money in the long run and build a portfolio with tangible results to show future clients.
Big supermarkets do offer this service, but delivery prices are often very high or the food is warm or bruised when it arrives at the customer's home. If you own a large car, you could become people's personal shopper. Some people do not have time to run errands after a long day at work and others may not have the physical capacity to do so, so why not do it for them? You could also couple this service with others, such as:
obrt: ≈ sole proprietorship; several types: slobodni, vezani, and povlašteni obrt (free, tied, and privileged proprietorship registered according to profession; tied and privileged proprietorships are those only master craftsmen can register,) paušalni obrt, obrt-dohodaš, obrt-dobitaš (flat-rate proprietorship, income tax p., profits tax p.; these are registered according to the type of taxation; first two are obligated to pay income tax and the last one is obligated to pay profits tax), sezonski obrt (seasonal proprietorship, that runs for a limited number of months during a year)