frbrook said "As it as been mentioned, organic isn’t really regulated. If you are interested in switching to organic and concerned about cost, I would recommend googling the dirty and clean 15 foods. It’s a good way to switch the most important foods to organic instead of an overhaul of your whole food choices. I think it’s also important to note that organic doesn’t necessarily mean “healthier”. Eating more whole, unprocessed foods and watching salt/sugar amounts in foods whether they are organic or not is the first step to a healthier diet. "
Initially, be selective about what you're buying. There are some products that are much bigger bang for your buck (and health) than others. Ultra processed food is always a bad idea, regardless of the health claims on the package (this i:ncludes fake meat). Some processing in foods is good - for example, frozen veggies are technically "processed", but minimally so and will extend the life of the food over fresh. Even the physical process of canned food isn't necessarily a bad thing, provided it's in a safe container and doesn't have loads of added salt, etc.
It's also important to understand how certain crops are grown and what chemicals (organic, conventional or otherwise) are applied. Organic does not necessarily mean chemical or input-free, and you might be surprised at what's actually allowed.
Lots of people get hung up on the organic certification, and if you're buying something that's coming from far away it's an assurance that a certain standard is met. However, you also need to understand what those standards are - they might not be exactly what you think.
If buying locally, get to know your producers. There are many excellent local producers that follow organic and holistic practices that have not gone through the cost of certification because it's unnecessary for them, selling direct to the consumer with whom they have a relationship.
Also, if you haven't already, be prepared to learn to preserve food.
And lastly, if you have lots of ultra-processed foods in your diet, you might want to focus on simply eliminating that instead of suddenly buying everything organic. You may find the benefits you're seeking at less cost and more convenience. What's important is that you're reaching for an apple instead of a candy bar, or whole grain rice vs. french fries. Things of that nature.