Good offerings to the Gods would be:
1. Your own advancement, AKA meditating and doing it in their name. For example, you start your working, ask that specific God for guidance and help with the working, and also declare that you do this in their name, to honor them and to grow just as the God wants you to. Nothing wrong with dedicating a material habit to a God as well, such as working out, or even something as mundane as cleaning one's house. The mental and spiritual benefits kind of blend together.
2. Helping the ToZ directly helps the Gods be known in a proper way by more people. This would mean participating in one of the many projects we can help with, or just being active here on the Forums to make the place look more lively. Helping others on the Forums yes, but as a beginner, one can also ask questions. This itself helps, because it grows activity, and gives others an opportunity to help you. Giving others good karma in this way surely has a positive effect on you as well, and you obviously get the benefit of getting the help you need.
3. Props, altar offerings and the like are mostly symbolic and most outsiders understand them wrong, and it obviously shouldn't be a first priority. That being said, keeping an altar and creating a habit of altar worship can have mental benefits, strengthen your bond with a God or the Gods, ground you and give you a more scheduled approach to things.
If you have privacy (or nobody is bothered by you being pagan), there's nothing wrong with designing an altar space with statues, pictures of the Gods and various other spiritual items. You can meditate next to it, do your void and focus meditation on various symbols you are using on the altar, and even create a daily worship session.
I particularly like the idea of Hindu Puja, as long as you don't go into it with a slavish attitude. One can take time out every day to pray at the altar, communicate with your GD, clean up idols, light incense and candles and so on. Even material offerings like fruit, flowers and so on, if you've got the financial freedom for that. The only mistake here would be to treat the physical offering as the important part, whereas the benefits are mostly mental and in building a better connection with the Gods by taking time to focus on them.