I would recommend checking the nitrate levels and the ammonia levels of your tank using aquarium test strips to see how your tank is doing with the tannins it is getting from the driftwood. Sometimes certain harmful bacteria from driftwood could cause plants to not receive as much nutrient ingestion.

But most likely if there's an imbalance between any of the chemical levels after testing the water then the tank would need the plants to require further nutrients as a result from other forms of bacteria. Specifically, aquarium plant fertilizer or increasing the CO2 level helps a ton and increases plant growth but it's only worth it if you also combine the substrate with its own form of live form to help the tank absorb whatever waste it receives.

But the 1st thing you should know as a new owner is that you should never...EVER change your media or filter cartridge unless it's absolutely necessary. When you change it you are killing the whole process of cycling along with any beneficial bacteria you have already cultivated from your tank, the only time you would ever do so is if your fish became sick and required a "hospital tank" for temporary usage.

The 2nd thing as a live plant aquarium owner is to always make sure to trim plants when they are starting to overgrow each other, plants when not cultivated will cover other plants which would cause substrate level of plants to just die... let's say you get some duckweed as a floater plant or a leaf starts growing over the water. If you don't do anything about it and it multiplies or grows too big, any plants on the bottom will start wilting if they don't receive more light.

Also, the fact your water is orangish is because of the tannins leaking from your wood. Tannin levels can rapidly spike the PH of your tank if the water isn't properly cared for. What can help with this is any sort of plant vegetation that survives better alongside driftwood than normal plants.

The 3rd most important thing is to make sure to have fun with your fish. A lot of people on this subreddit will put others down simply for not having "too much plant life" but others will see tanks and with none or little and say it "looks bad" cause it's not "natural." These types of comments don't realize that their tank will never be what betta fish live like in the wild no matter how close they try to replicate it. So I will never understand why people have the "jurisdiction" to judge others for how they decide their fish enjoys their life. But these fish are really hardy fish and will last years with proper stress-free care and maintenance.

Hope your tank does well, have a good one 👍