Are you selling in a specific area or trying to sell nation wide online? If you’re selling in a smaller area, for beginners to Google ads I recommend creating a Smart Campaign. They’re easy to setup and give good recommendations. It does a bit of hand-holding and optimizes the campaigns for you over time. If you’re trying to sell nation-wide it can be more tricky. Try Smart Shopping campaigns or Dynamic Search Campaign and use a Target ROAS bid strategy. Target a return that you can at least break even or make a profit. It will take some setup and you’ll need a data feed, merchant center setup, and analytics setup. There are plenty of tutorials for setting these campaigns up online. Let things run for at least a week to learn before making major changes. It will cost how ever much you want to spend daily, you set the budget. Hope that helps! It’s hard to put everything in a short comment.